1. Chemistry

    1. An aqueous solution contains 0.154 M ascorbic acid (H2C6H6O6) and 0.196 M hydrobromic acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. Can you explain how to do this please? thank you. Also if you can is number 2 missing

    asked by Mohamed on April 26, 2012
  2. Physical Science

    To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

    asked by Vegeta Super Saiyan 3 on January 6, 2011
  3. Physical Science

    To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

    asked by SHAZAM on January 7, 2011
  4. Physical Science

    To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

    asked by Mr. Sandwich on January 11, 2011
  5. chemistry

    If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you will obtain a solution that has three H+ ions for every Co3+ ion that was originally present in the sample. These H+ ions are

    asked by xx on October 26, 2014
  6. chemistry

    ou weigh out Potassium Permanganate, Mass of KMnO4 (MW=158.034).......... 0.1569 g You dissolve it completely in water.......... 46.00 mL (a) Molarity of MnO4- solution........................... ________________ M You pipet out your UNKNOWN.............

    asked by faruk on July 27, 2013
  7. Physical Science

    To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

    asked by Mr. Sandwich on January 11, 2011
  8. chemistry

    ou weigh out Potassium Permanganate, Mass of KMnO4 (MW=158.034).......... 0.1569 g You dissolve it completely in water.......... 46.00 mL (a) Molarity of MnO4- solution........................... ________________ M You pipet out your UNKNOWN.............

    asked by faruk on July 26, 2013
  9. reading

    i need to do a reading essay on maya angelou this is what i have intoduction: maya angelou was born april 4, 1928 in st.louis missouri. she is an author, poet, playwright, stage and screen performer, and director. she has a brother named bailey when they

    asked by naomi on December 5, 2012
  10. chemistry

    The values of Ksp for AgBr and AgCl, are 7.7x10^-13 and 1.6 x 10^-10. A solution containing a mixture of 2.0x10^-2 M Br and 2.0 x 10^-2M Cl is a candidate for separating using selective precipitation. Solid AgNO3 is added, with a miniature spatula, and

    asked by Jin on July 24, 2010
  11. engineering

    If a pogo stick was to be reinvented and you were to choose the spring type. What type of spring will generate the most return of kinetic energy compared to least amount of force needed to compress the spring...you can use leaf, coil, scissor, compression,

    asked by dave on March 7, 2011
  12. Biology

    19. Which is NOT a general characteristic of plants? a. use oxygen to make usable energy b. primary producers c. have specialized cells d. cell walls composed of cellulose I think it might be either A or B... 20. Which of the following are characteristics

    asked by mysterychicken on February 19, 2010
  13. Biology

    19. Which is NOT a general characteristic of plants? a. use oxygen to make usable energy b. primary producers c. have specialized cells d. cell walls composed of cellulose I think it might be either A or B... 20. Which of the following are characteristics

    asked by mysterychicken on February 18, 2010
  14. chenistry

    25ml of a solution of na2c03 having a sepcific gravity of 1.25g solution of hcl containing 109.5g of the acid per litre for complete neutralization. Calculate the volume of 0.84N h2s04 that will be compltetly neutralized by 125g of na2c03 solution. In

    asked by Fai on February 17, 2013
  15. chemistry

    22 mL of 0.37 mol per litre acetic acid is titrated by way of a standardized 0.29 mol/L KOH solution. Calculate the pH of the solution after roughly 18 mL of the solution of KOH is added. The Ka of acetic acid proves to be 1.8 x 10^-5

    asked by Joseph on April 9, 2008
  16. Science

    Answer with solution, plz. 1. What is the concentration of the solution by volume when dissolved is used 30 grams & the water is 60 grams. 2. How much solvent in grams is present in a solution with a concentration by volume of 40% the solute of content is

    asked by Rachel on October 3, 2016
  17. Chemistry

    An aqueous solution of copper (I) chloride is 15.7% by mass copper (I) chloride. Copper (I) is 35.8% by mass chlorine. If the solution has a density of 1.045 g/cm³, how many gallons of solution contain 2.3 kg of copper? Trying to help my son study. Thank

    asked by Mom on October 9, 2011
  18. Chemistry

    An aqueous solution of copper (I) chloride is 15.7% by mass copper (I) chloride. Copper (I) is 35.8% by mass chlorine. If the solution has a density of 1.045 g/cm³, how many gallons of solution contain 2.3 kg of copper? Trying to help my son study. Thank

    asked by Mom on October 9, 2011
  19. Chemistry

    An aqueous solution of copper (I) chloride is 15.7% by mass copper (I) chloride. Copper (I) is 35.8% by mass chlorine. If the solution has a density of 1.045 g/cm³, how many gallons of solution contain 2.3 kg of copper? Trying to help my son study. Thank

    asked by Mom on October 8, 2011
  20. Chem 104

    From M1V1=M2V2 the volume of the KHP solution the molarity of the titrant and the volume of the titrant, find the molarity of the KHP solution . The KOH solution is the titrant since it is used to titrate the KHP solution. KHP mass-204.2 Mass per liter in

    asked by Hannah Marie on November 10, 2016
  21. English

    Lying in a Hammock at William Duffy's Farm in Pine Island, Minnesota? What is the significance of this poem? What does the author mean by the last line? I don't understand what this poem is about and any help would be greatly appreciated! Over my head, I

    asked by Joe on July 10, 2011
  22. Chem

    I did this experiment where I filled a graduated cylinder with water. The I put a stopper on it and put it under water and removed the stopper. The with a modified lighter (that wouldn't release sparks) I added butane gas. I got the following results: mass

    asked by Lena on December 11, 2008
  23. chemistry

    when you hold a hydrogen filled pipet bulb horizontally with its mouth about 1 cm from a falme while gently squeezing what would you observe? a. the flame goes out b. a gentle pop and the flame may have been blown out c. the flame got bigger d. nothing

    asked by grace on May 10, 2010
  24. Language Arts

    May some one check my answers please for Lesson 18: Adventures and Imagination Unit Test: questions 10 - 16 10. Complete the sentence with the word or phrase that has the most positive connotation. When we saw her barefoot and wearing flowers as a crown,

    asked by meh on April 27, 2018
  25. geometry

    Raul is laying a cement concrete walkway in his backyard. He decides to put a turn of 30° from the horizontal in the walkway to go around a tree and flowerbed. Once he gets past the tree, he wants to continue the walkway in the same direction as before.

    asked by Danielle on November 17, 2015
  26. Chemistry

    To illustrate the calculation, assume that 21.95 mL of a thiosulfate solution is required to reduce the iodine liberated by 20.85 mL of 0.0200M KIO3 and that 18.63 mL of the same thiosulfate solution reacts with the iodine replaced by 20.00 mL of an

    asked by Marcus on April 26, 2013
  27. chem

    a 45.8mL sample of a 5.8 M KNO3 solution is diluted to 1.00L. What volume of the diluted solution contains 15.0g KNO3? how do you do this? moles of solution: 5.8*.0458 moles Grams of solute= moles*molmassKNO3 Volume of 15g= 1000ml*15/gramssoluteabove

    asked by kyle on April 5, 2007
  28. Physical Chemistry

    One potential problem with using molarity to express concentration is that molarity is temperature dependent. If you make a 1.000 M solution of aqueous HCl at 25 degrees celsius, what would the molarity of this solution become if the temperature of the

    asked by Matt on September 29, 2017
  29. DEATH OF A SALESMAN???

    What does Linda mean when she said “attention must be paid” to Willy Since I don't know the specific context of that statement within the book, I can't really answer your question. What happened just before she made this statement? This might give you

    asked by Willy on November 21, 2006
  30. English

    Thank you very much for your corrections. Can you tell me if the following household chores are possible? Please, let me know if there is a better expression. I have to: sweep, vacuum and mop floors wipe counters, stove top, table and cupboards. sort the

    asked by Franco on March 28, 2010
  31. math!

    A shopkeeper had 330 tangerines. He put some of them into 15 cartons containing 12 tangerines each. He then put the rest into 14 cartons, each containing the same number of tangerines. How many tangerines were in each of the cartons of the 14 cartons and

    asked by anon. on May 19, 2014
  32. Chemistry

    100 mL of buffer solution that is 0.15M HA (Ka= 6.8x10-5) and 0.20M NaA is mixed with 15.2mL of 0.35M NaOH. What is the pH of the resulting solution? 100 mL of buffer solution that is 0.15M HA (Ka= 6.8x10-5) and 0.20M NaA is mixed with 28.3mL of 0.25M HCl.

    asked by Anonymous on September 29, 2018
  33. Physical Science

    To create a supernaturated solution, a student heats a beaker of water on a hot plate and adds sugar until no more sugar will dissolve. The student then strains the solution through a funnel using filter paper and allows the solution to cool. Name two

    asked by SHAZAM on January 12, 2011
  34. Chemistry

    Please help! I'm trying to find the solubility of Ca(OH)2 in .001305 mol/L aqueous NaOH? Saturated solution of Ca(OH)2 in 0.01305 mol/L NaOH. [HCl] = 0.1213 M Volume of HCl = 9.81 mL Volume of Ca(OH)2/NaOH aliquot = 25ml Find: 1. the TOTAL [OH-] in the

    asked by Alex on March 20, 2017
  35. Calculus

    ok I don't understand how this was done inergral(y2 and y1) pgywdy = 1/2 pgw(y2^2 - Y1^2) ok it's been a while sense calc I rember you add one to the power of the term that was a dervitative and divide by that power hence (1/2)(y2^2 - Y1^2) but what

    asked by Calculus on October 24, 2009
  36. Social Studies

    When Nelson Mandela received the Nobel Peace Prize, he gave a speech in which he noted the contributions of Martin Luther King Jr. Here are some words of his speech: "...It will not be presumptuous of us if we also add, among our predecessors, the name of

    asked by Jerald on April 11, 2013
  37. math

    1. Your property taxes come due annually and generally cost about $2,300. You decide that you would like to put a monthly amount aside to be prepared for when this bill comes. How much should you put aside each month? About $192 each month About $230 each

    asked by Anonymous on June 6, 2018
  38. SCIENCE-BONES-NEED HELP

    Do all bones store fat and produce blood cells? And do all bones contain yellow and red bone marrow? Im talking about the hand bones (phalanges, carpals, metacarpals)Thanks!

    asked by Sammy on October 6, 2016
  39. chemistry

    You have a 250ml solution of 0.13M calcium iodate. How many grams of potassium iodate need to be added to the solution to begin to precipitate calcium iodate? The solubility product constant for calcium iodate is6.47 *10^-6. B) you have a 250ml solution of

    asked by anonymous on November 18, 2015
  40. Chemistry

    A 10.0 L container contains 1.0 L of solution of a gas. Assume [gas]=1.5x10^-4 M in solution when 2 mol of gas remain in gas form. If 1 mol of gas is removed from the gas phase, what will be the new concentration of the gas in solution? What is the value

    asked by Sarah on February 15, 2016
  41. Chemistry

    Another student determined the concentration of a vinegar solution to be 0.240 mol/L. If the accepted value for the concentration of the vinegar is 0.250 mol/L, the student's percentage erreo is A. 1.00% B. 1.24% C. 2.40 % D. 4.00% D. because the

    asked by Brittany Rusk on September 21, 2006
  42. ECE

    1.when a child hits another child because he is angry, the best way to handle the situation is to? A.send the hitter to a time-out chair B.intervine immediately and ask each child what happened C.tell the second child to hit the first child back D.make the

    asked by Leeann on December 7, 2012
  43. Physics

    You are heating water in a pot on the stove. Shortly before the water boils properly, bubbles of steam begin rising from the bottom of the pot but vanish before they reach the water’s surface. What happened to those bubbles?

    asked by Bob on May 28, 2012
  44. Physics

    You are heating water in a pot on the stove. Shortly before the water boils properly, bubbles of steam begin rising from the bottom of the pot but vanish before they reach the water’s surface. What happened to those bubbles?

    asked by Bob on May 29, 2012
  45. science

    For this activity, we had to make cube shaped models to represent cells. Then we had to compare aurafve area, volume, and surface area to volume ratio (SA:V) between the cells. Cell A: length of one side=1cm Surface area= 6cm^2 Volume= 1cm^3 SA:V= 6 Cell

    asked by Sarah on March 21, 2017
  46. Chemistry-ksp and kb

    We were given a 0.1 M KOH solution.25cm3 of that solution is taken and 5g of MX precipitate is added to that.X- is an anion of a strong acid. Kb for MOH=2*(10)^-5 Ksp for MX= 3*(10)^-6 M 1)find the [M+] in the solution 2)Find the [X-] concentration and pH

    asked by Shenaya on May 24, 2017
  47. Math 6th grade

    Aliaba was arranging the carpets for the flying carpet brigade They were going to fly in a rectangular formation when he put 4 carpets in each row he ad 3 left over . When he put 5 carpets in each row he had one left over. How many carpets could there have

    asked by Christen on September 9, 2014
  48. english

    Hello! I'm a French student,I'm 17, I've learned the beginning of Freedom by Jonathan Franzen. Sometimes, it seems confused as it's my second language. So I need help, please. Can you explain what happened with Patty, Eliza, Carter, Richard and Walter in

    asked by V on November 6, 2011
  49. chemistry12_2016-2

    14.0 grams of potassium hydroxide was dissolved to form 100 centimetre cubeof an aqueous solution. What was the concentration of this solution in mol/decimetre cube.

    asked by Anonymous666_4 on March 27, 2016
  50. Chemistry #4

    What is the concentration of a solution formed by dissolving 10.0g of ammonium acetate in enough water to form 150.0mL of solution? Could someone please explain and show me how to do this? I have the answer= .865M But I am not sure exactly how?!

    asked by Chelsea on December 9, 2013
  51. chemistry

    50 mL of a 2.50 M solution of ammonium phosphate is added to 100mL of a 1.50 M solution of calcium nitrate. At the end of the reaction 11.2 grams of precipitate produced. What is the percent yield

    asked by Bleh on April 18, 2012
  52. Chemistry

    Refer to the calibration curve shown in the experiment. If the absorbance of the solution is 0.400, what is the concentration of the iron in that solution? Show or explain how you arrived at your answer.

    asked by Elly on June 20, 2011
  53. chemistry

    what volume of a 0.247 M perchloric acid solution is required to neutralize 23.8 mL of a 0.156 M calcium hydroxide solution? _titration problem of acids/bases

    asked by Elise on April 2, 2015
  54. Chem

    A 0.2181 g sample of KHP required 17.29 mL of sodium hydroxide solution to reach the phenolphthalein end point. Calculate the molarity(M) of the NaOH solution.

    asked by Donnie on October 9, 2012
  55. chem

    A sample of 45.0 ml of 0.750M AgNO3 solution is added to 65.0ml of 1.375M Cr(NO3)3 solution. Calculate the resultant concentration of nitrate ions in the mixture.

    asked by bec on January 7, 2009
  56. Chemistry

    A solution of boric acid (H3BO3) in water has a pH of 3.45. If the solution also contained NaHBO3, what do you expect to happen to the pH? Increase Decrease Stay the same Not enough information provided

    asked by apersonyoudontknow on March 20, 2017
  57. chemistry

    Please help?! if 600 mL of a 0.04M KCl solution is mixed with 50mL of a 0.03M Na2SO4 solution, will a precipitate be formed? Explain your reasoning and/or show all calculations?

    asked by ryan on February 1, 2015
  58. chemistry

    sorry i forgot some of the units in the initial posting 8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, , in this solution?

    asked by katy on November 2, 2009
  59. Chemistry

    You mix 200.0 mL of 0.350 M HCl with a 300.0 mL solution of 0.100 M Ba(OH)2. Calculate the concentration of each ion remaining in the solution after the reaction has reached completion.

    asked by Leslie on September 25, 2013
  60. Chem II

    Find the mass of sodium formate that must be dissolved in 200.00cm^3 of a 1.0M solution of formic acid to prepare a buffer solution with pH=3.40? I have no clue how to work this out. Please help me.

    asked by Bianca on November 19, 2012
  61. Chem

    If a solution containing 88.445 g of mercury(II) perchlorate is allowed to react completely with a solution containing 13.180 g of sodium sulfide, how many grams of solid precipitate will be formed?

    asked by asd on February 1, 2016
  62. CHEM

    What is the molarity of potassium iodide solution prepared by adding 5.810g of KI to sufficient water to make a final solution volume of 250.0mL?

    asked by Lisa on February 7, 2013
  63. chemistry

    8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution? Express your answer with the appropriate units.

    asked by Anonymous on November 7, 2014
  64. chemistry

    to what volume should you dilute 125mL of an 8.00M CuCl2 solution so that 50.0mL of the diluted solution contains 5.9g KNO3 I have a hard time determing the M1V1=M2V2 is

    asked by swtnblk on November 6, 2011
  65. Chemistry

    An aqueous solution with a density of 0.998 g/ml at 20 degrees Celsius is prepared by dissolving 12.8 mL of CH3CH2CH2OH (p=0.803 g/mL) in enough water to make 75.0 mL of solution calculate the molarity

    asked by Jessica on October 1, 2011
  66. chemistry

    If a solution containing 34.576 g of mercury(II) perchlorate is allowed to react completely with a solution containing 10.872 g of sodium sulfate, how many grams of solid precipitate will be formed?

    asked by lee on April 19, 2013
  67. analytical chemistry

    What volume (in liters) of 0.96 M KOH solution should be added to a 0.130 L solution containing 10.2 g of glutamic acid hydrochloride (Glu, FW=183.59; pKa1=2.23, pKa2 =4.42, pKa3=9.95) to get to pH 9.90?

    asked by joi on March 27, 2014
  68. Chemistry

    How many grams of solid KOH must be added to 100ml of a buffer solution which is 0.1M each with respect to the weak acid HA and its potassium salt KA in order to make the pH of the solution 6.0?

    asked by Sandu on October 4, 2016
  69. algebra

    solve the following systwm graphically. Be sure to check your solution. if the system has an infinite number of solutions, use set-builder notation to write no solution, state this. 4y=x+8, x=2/3y+2

    asked by jessica on July 9, 2014
  70. chemistry

    the student's lab manual says to mix some of his CaCl2 solution with an aqueous solution of sodium carbonate (Na2CO3). What evidence of a chemical reaction would he expect to see?

    asked by jalisa on December 17, 2012
  71. chemistry

    if 36.23mL of a standard 0.1959M NaOh solution is required to neutralize 25.00mL of H2SO4. what is the Molarity of the acid solution, balance the equation. Please help with calculation. Thank you for your help.

    asked by kate- Please help on September 1, 2012
  72. Chemistry

    Balance these reactions using the half-reaction method Sn2+ + IO3- -> Sn4= + I- (acidic solution) CrO2 + ClO- -> CrO42- + Cl- (basic solution)

    asked by Mary on May 26, 2010
  73. CHEM

    What is the molarity of a calcium sulfate solution prepared by adding 27.89g of CaSo4 to sufficient water to make a final solution volume of 1.00L?

    asked by Lisa on February 7, 2013
  74. chemistry

    What volume (in liters) of 0.94 M KOH solution should be added to a 0.090 L solution containing 9.1 g of glutamic acid hydrochloride (Glu, FW=183.59; pka1=2.23, pka2=4.42, pka3=9.95) to get to pH 10.20?

    asked by Decisice 2 on May 23, 2013
  75. chemistry

    What volume (in liters) of 0.96 M KOH solution should be added to a 0.090 L solution containing 9.9 g of glutamic acid hydrochloride (Glu, FW=183.59; pKa1=2.23, pKa2 =4.42, pKa3=9.95) to get to pH 10.20?

    asked by shanonn on May 3, 2013
  76. Chemistry

    If a solution containing 107.68 g of mercury(II) perchlorate is allowed to react completely with a solution containing 17.796 g of sodium sulfide, how many grams of solid precipitate will be formed?

    asked by Julia on October 11, 2016
  77. chemistry

    A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 400 of a solution that has a concentration of ions of 1.20 ?

    asked by Marry on September 29, 2010
  78. chemistry

    An aqueous solution contains 0.445 M ethylamine (C2H5NH2). How many mL of 0.226 M hydrochloric acid would have to be added to 150 mL of this solution in order to prepare a buffer with a pH of 10.200

    asked by chem on March 16, 2015
  79. Chemistry

    A 25.0mL sample of a 0.100M solution of acetic acid is titrated with a 0.125M solution of NaOH. Calculate the pH of the titration mixture after 10.0, 20.0, and 30.0 mL of base have been added.

    asked by Amanda on November 8, 2010
  80. Chemistry

    How many grams of aspirin (C9H8O4) are required to react with exactly 29.40 mL of a 0.02400% w/w solution of sodium hydroxide (NaOH)? What would the consequences be in 0.01200% w/w solution was used instead? Thanks for any help - no idea how to proceed.

    asked by Che on January 18, 2011
  81. chem

    Assume that 35.0 mL of a 0.13 M solution of a weak base B that accepts one proton is titrated with a 0.13 M solution of the monoprotic strong acid HX. (a) How many moles of HX have been added at the equivalence point?

    asked by hannah on March 24, 2013
  82. chem 1046

    Calculate the solubility (in grams per 1.00 102 mL of solution) of magnesium hydroxide in a solution buffered at pH = 9. Enter your answer to 2 significant figures.) Ksp = 2.06e-13

    asked by Anonymous on July 9, 2012
  83. chemistry

    a 12ml sample of 0.4m silver nitrate solution is mixed with 8 ml of 0.8m sodium chloride solution. determine the identity of precipitate and the number of grams produced.

    asked by Anonymous on May 4, 2015
  84. Super quick english question

    Which sentence shows correct capitalization and use of end marks inside parentheses? I put your guitar (The dog keeps knocking it over) back in your room. I put your guitar (The dog keeps knocking it over.) back in your room. I put your guitar (the dog

    asked by Lana Del Rey on December 14, 2013
  85. Chemistry-Experiment

    I did an experiment where I had 5 ml of MgCl2, then 5 ml NH4 solution (NH4OH (aq)) was added and it was observed that a precipitate formed; cloudy solution. After I added 1g of NH4Cl(s), the solution clears up (transparent). 2nd experiment: There was 5ml

    asked by Fresca on March 30, 2012
  86. Chemistry

    Under an O2(g) pressure of 1.00 atm , 28.31mL of O2 (g) dissolves in 1.00L H2O at 298K. What will be the molarity of O2 in the saturated solution at 298K when the pressure is 3.86atm ? (Assume that the solution volume remains at 1.00L .) I used PV=nRT and

    asked by Someone please help. on February 22, 2010
  87. Chemistry

    Under an O2(g) pressure of 1.00 atm , 28.31mL of O2 (g) dissolves in 1.00L H2O at 298K. What will be the molarity of O2 in the saturated solution at 298K when the pressure is 3.86atm ? (Assume that the solution volume remains at 1.00L .) I used PV=nRT and

    asked by Amber on February 22, 2010
  88. Science

    You mix oil and vinegar for a salad dressing. After a few minutes, the oil has separated and is floating. Infer which has the greater density - oil or vinegar. Explain. I put "Vinegar has more density since it's on the bottom, where the oil has less since

    asked by Lilly on April 15, 2015
  89. Calculus

    Can someone check my work and answer? Evaluate the integral from -1 to 0 of (4x^6+2x)^3(12x^5+1)dx My work: let u=4x^6+2x dx=du/24x^5+2 now we have the integral from -1 to 0 of u^3(12x^5+1)(du/24x^5+2) Simplifies to the integral from -1 to 0 of

    asked by Liz on February 18, 2018
  90. science

    After the experiment, scientists orginize and ? te data? records the data I started to be a smart alec and put "massage" the data. :) Report the data would fit here also. Technically, we should record the data in the process of doing the experiment. If we

    asked by chris on October 10, 2006
  91. Chemistry

    A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution?

    asked by Ana on May 26, 2011
  92. chemistry

    The pH of saturated is found to be 13.12. A 15.0mL sample of saturated Sr(OH)2 is diluted to 250.0mL in a volumetric flask. A 15.0 mL sample of the diluted Sr(OH)2 is transferred to a beaker, and some water is added. The resulting solution requires 27.6mL

    asked by chips ahoy on April 11, 2011
  93. chem

    Equal volume of a 0.02 M Zn+ solution and a 2.0M NH3 solution are mixed. Kf for [Zn(NH3)4] is 4.1*10^8. If enough sodium oxalate is added to make the solution 0.1 M in oxalate, will ZnC2O4 precipitate. Ksp ZnC2O4= 2.7*10^-8. I set up an ICE table which

    asked by Sara on August 10, 2009
  94. chemistry

    If you add 50 g of sylvite in 100 ml of water at 60 ° C, the resulting solution will she unsaturated, saturated or supersaturated? You prepare a solution and you add 50 g of potassium nitrate to 100 ml of water at 50 ° C. What type of solution are you

    asked by Kay on February 8, 2011
  95. PreCalc

    Approximate the solutions to the following equation on the interval [0,2π). Round your answer to four decimal places. sinθ=0.65 Apparently, there suppose to be two answers to this question with a comma separating​ both answers. I know because I've

    asked by chizoba on August 15, 2016
  96. Chemistry

    A solution is prepared by dissolving 0.56 grams of benzoic acid (HC6H5CO2, MM = 122.12 g/mol, Ka = 6.4 X 10-5) in enough water to make 1.0 L of solution. Calculate the pH of this solution at equilibrium. 2. Calculate the pH of the system in Question 1 when

    asked by meow on March 26, 2019
  97. math

    log4(x-3)=2 4^2=x-3 16=x-3 19=x Does this mean the solution would be x=19 or no solution? How would I check this to know if 19 is a solution. I know I plug it back in. Like so: log4(19-3)=2 4^2=19-3 16=16 Did i check correctly?

    asked by Anonymous on November 20, 2014
  98. algebra

    How many liters of 20% alcohol solution should Maria mix with 50 liters of a 60% alcohol solution to obtain a 30% solution?

    asked by Deja on July 23, 2010
  99. Algebra II

    What is the solution of the system of equations? {-3x - 4y - 3z = -7 {2x - 6y + 2z = 3 {5x - 2y + 5z = 9 A. (5,-2,7) B. (-5,2,7) C.(5,2,-7) D. No solution Use a matrix to find the solution to the system of equations. {-8x - 8y = -16 {6x - 9y = -108

    asked by HELPME on September 27, 2018
  100. Math

    How many gallons of 15% iodine solution should be mixed with 40% iodine solution to make 100 gallons of a 20% solution?

    asked by Helen on January 24, 2012