1. Chemistry

    I don't understand ice table at all..can anyone please guide me in how to solve the following question? : The pH of a 0.00250 mol/L solution of benzoic acid is 3.65. Calculate the Ka for the benzoic acid. (This question does not state that the given

    asked by Jessica on June 15, 2010
  2. Chemistry

    a solution of HCL is approximately 0.1M and has to be standardized . 1.234g Na2CO3 are dissolved to make 100ml of solution. 20mL of this solution are titrated with the HCL solution, requiring 31.3mL for the second equivalence point. what is the exact

    asked by Joshua on January 14, 2015
  3. Chemistry

    Consider the system: A (aq) → B (aq) at 293 K where ΔGo of formation A = -11.3 kJ/mol and ΔGo standard of formation B = -12.9 kJ/mol. Calculate the concentration of A at equilibrium when 2.41 mol of A and 1.35 mol of B are mixed in water to form

    asked by Edgar on March 11, 2019
  4. chemistry

    Calculate how much K3Fe(CN)6 [MW: 329.24] you would need to weigh out to make a 1x10-3 M solution dissolved in 0.2 M NaNO3 in a 100 ml volumetric so far i have worked out that 0.329 g will give me the 1x10-3 M, but im confused when it is dissolved into the

    asked by QJ on October 8, 2014
  5. chemistry

    A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.

    asked by CC on February 9, 2010
  6. chemistry

    A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.

    asked by CC on February 9, 2010
  7. Chemistry

    1) Calculate the amount of sodium chloride, NaCL (mol wt 58.44) and potassium chloride; KCL (Mol wt 74.56) needed to prepare 500 ml of 1.25 NaCL/10 mM kcl solution dilutions in water.

    asked by Daniel on December 6, 2011
  8. chem

    which is the correct balanced equation for a given titration process, (a) or (b)? a) 6H+ + 2MnO4- + 3H2O2 -> 4O2 + 2Mn2+ + 6H2O b) 6H+ + 2MnO4- + 5H2O2 -> 5O2 + 2Mn2+ + 8H2O Process: Make a solution in a 100mL volumetric flask using 1g of NaBO3*4H2O, 20mL

    asked by sarah on March 30, 2011
  9. algebra

    1. Tell whether the system has one solution infinitely many solutions or no solution. 6y=-5x+24 2.5x+3y=12 a. one solution b. infinitely many solutions*** c. no solution i know its B but can you solve it step by step for me thank you

    asked by Leslie on December 12, 2016
  10. algebra

    a chemist needs to mix a 70 alcohol solution with a 40 alcohol solution to obtain 75 liters of a 50% alcohol solution. how many liters of each alcohol solution must be used

    asked by Anonymous on April 17, 2019
  11. Math

    1) Find the solution to the following system of two linear equations, if it has a solution. 2x-y=3, -x+y=1 2Find the solution to the following system of two linear equations, if it has a solution. 2x+y=4, x+3/2y=3

    asked by Megan on October 13, 2011
  12. Organic Chemistry

    How am I supposed to do these questions? I'm completely lost. A 0.120 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 130.0 g/mol. (b) What is the

    asked by Jeff on November 8, 2015
  13. physics (mirrors)

    An object is placed from a concave mirror with a radius of curvature of 50cm. The object has a height of 5cm. a)Calculate the focal lenght of the mirror. b)Calculate the position of the image formed by the mirror. Is the image real or virtual? c)Calculate

    asked by amy on April 25, 2017
  14. chemistry

    How many moles of excess reactant are present when 3.50 x 10^2 mL of 0.216 M sulfuric acid reacts with 0.510 L of 0.202 M sodium hydroxide to form water and aqueous sodium sulfate?

    asked by larry on September 19, 2009
  15. Chem

    How many moles of excess reactant when 338mL of 0.226M sulfuric acid reacts with 0.493L of 0.211M sodium hydroxide to form water and aqueous sodium sulfate?

    asked by Lindsey on December 3, 2009
  16. Science

    arrange the following aqueous solutionsin order of increasing freezing points(lowest to highest temperature): 0/10m glucose, 0.10m BaCl2, 0.20mNaCl, and 0.20m Na2SO4.

    asked by Jill on September 11, 2013
  17. chemistryhelp

    how many moles of excess reactant are present when 3.20 x 10^2 mL of 0.226 M sulfuric acid reacts with 0.531 L of 0.185 M sodium hydroxide to form water and aqueous sodium sulfate

    asked by sydney on October 2, 2013
  18. Chemistry

    I am having trouble balancing the following equation using the Ion-Electron Method. Se(solid) + HNO3(aqueous) ----> SeO2(solid) + NO(gas) + H2O(liquid) Can you explain the steps that you have to take to solve it?

    asked by Laura on September 12, 2011
  19. Physics

    A 245 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 35.0 cm, as shown in Figure 5-21. (a) Calculate the gravitational potential energy at A relative to B. 1 . (b) Calculate the particle's kinetic energy at B. 2

    asked by Brooks on October 20, 2011
  20. Chemistry

    What is the effect on the boiling point of a solution (for example, water) produced by a soluble nonvolatile substance (for example, sodium chloride)? What is the effect of an insoluble substance such as sand or charcoal? I believe if an insoluble

    asked by Phil on November 10, 2008
  21. chemistry

    According to Raoult's law, which statement is false? a. The vapor pressure of a solvent over a solution decreases as its mole fraction increases. b. The solubility of a gas increases as the temperature decreases. c. The vapor pressure of a solvent over a

    asked by thanh on March 14, 2008
  22. math

    Find the solution of the given system by the method of addition that was used in Examples 4 and 5. If there is no solution or infinitely many solutions, state so. Put the value for x in the blank. 2x - 3y = 1; x + 2y = 4

    asked by tanya on April 3, 2012
  23. Chemistry

    Which one of these properties is directly proportional to molality and why? A) Electrical conductance B) Heat of solution C) Equilibrium of solution D) Vapour pressure Thanks

    asked by MAD on July 3, 2017
  24. Chem 121

    A solution is made by dissolving 0.35 mole of LiI in enough water to give a final volume of 260.0 mL. What is the molarity of the solution?

    asked by Barbara on July 26, 2011
  25. Chemistry

    A student mixed 40ml of 0.2m Na2co3 solution with 50 ml f 0.25M cacl2 solution , what is the except number of moles of naclkkw that I will be formed ?

    asked by Mariam on April 20, 2014
  26. chemistry

    A solution is made by dilution 400.mL of 2.0 M HCL to a final volume of 1000. mL. what is the pH of this solution? i'm stuck on this question i have no idea what to do, can anyone help? thanks:)

    asked by Miley on May 15, 2008
  27. CHEM 1411

    What volume (in mL) OF 0.0215M HBr solution is be required to titrate 0.235L of a 0.0150M Ca(OH)2 solution? Ca(OH)2+2HBr= CaBr2+2H2O

    asked by JACI WINLOW on October 18, 2016
  28. chem

    a volume of 10.0 ml of a 0.00450 M solution of Cl- ions are reacted with 0.500 M solution of AgNO3.What is the maximum mass of AgCl that precipitates?

    asked by sam on October 10, 2011
  29. chemistry

    What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution?

    asked by smith on November 29, 2010
  30. chemistry

    What is the molarity of a solution composed of 2.23 g of potassium iodide (KI) dissolved in enough water to make 0.181 L of solution? Answer in units of M

    asked by Roberta on February 25, 2014
  31. Chemistry

    when dissolved in an aqeous solution, which of the following salts will yield an acidic solution? NH4Cl, NaClO4, Na2S, MgBr2, Ba(CH3CO2)2

    asked by james on March 22, 2010
  32. Chemistry

    KClO3 dissociated in H20 should form a neutral solution. The results proved to be a slightly acidic solution with a pH of 6. What happened?

    asked by Misha on March 2, 2013
  33. BioChem

    Write the chemical equation for the reaction that occurs when you add NaOH solution to NaH2PO4/Na2HPO4 buffer solution

    asked by Megan on March 23, 2012
  34. Chemistry

    What will be the concentration if 52 milliters of a solution that is 12 parts per million in sodium chloride is diluted with enough water to make 97 millilters of solution?

    asked by Whitney on February 14, 2012
  35. chemistery

    A student dissolves 196 g of H3PO4 (Molar mass = 98 g) in enough water to make one liter of solution. The molarity of the solution is ?

    asked by ogb on December 9, 2012
  36. chemistry

    A 4.691 g sample of MgCl2 is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?

    asked by nalleli on October 4, 2010
  37. URGENT CHEMISTRY

    A solution of hydrogen peroxide is 24.26% by mass and has a density of 1.11g/cm^3. the molarity of the solution? 7.54M .273M 8.03M 8.37M none of these

    asked by Cotton McKnight on March 9, 2011
  38. chemistry

    A solution of Na2CO3 is added dropwise to a solution that contains 1.34×10−2M Fe^2+ and 1.33×10−2M Cd^2+ . What CO3^2- concentration of is need to initiate precipitation? Neglect any volume changes during the addition.

    asked by CHEMISTRY on March 14, 2009
  39. Chemistry

    A 4.379 g sample of MgCl2 is dissolved in enough water to give 750.0 mL of solution. What is the chloride ion concentration in this solution?

    asked by Chris on April 14, 2014
  40. Chemistry help

    2.00g of NaOH are dissolved in water to make 2.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?

    asked by Anonymous on July 29, 2013
  41. chemistry

    What is the maximum amount of silver in grams that can be plated out of 3.8L of an AgNO3 solution containing 3.3% Ag by mass? (Assume that the density of the solution is 1.02g/mL .)

    asked by Anonymous on November 29, 2014
  42. Chem 2

    What is the molarity of a solution composed of 8.210g of Potassium Chromate (K2CrO4),dissolved in enough water to make .500 L of solution

    asked by Cassidy on December 17, 2012
  43. Chemistry

    What volume of a 0.5 M solution is required to prepare 250 mL of a 0.15M solution? (Note: M = mole per Litre) Is 175ml correct?

    asked by Many on November 13, 2012
  44. Algebra Help

    I have a question regarding this problem below? I noticed it in an eariler post, and have come to figure that my text book has it like this? What would be the solution for this? x+sqrt(11-x)= 5 x = 2? OR 2,7? OR NO solution? I say x = 2 only? Any Thoughts?

    asked by Robert on August 3, 2009
  45. Chemistry

    What is the molarity of a solution made by dissolving 2.00g of potassium chloride (KCl) in enough water to make 150 ml of solution?

    asked by Gerard on April 19, 2017
  46. chemistry

    I'd like to do a titration test, I've got a sulphuric acid solution @ 1M (2N) but I need one @ 0.12N. How many ml of the 1M (2N) solution do I need to add to distilled water to make up 100ml please?

    asked by Graham on August 2, 2013
  47. Intermediate Algebra

    Solve using the elimination method.Show work.If system has no solution state this or infinite solution 8x+10y=-34 16x-5y=-43

    asked by sherry on March 27, 2012
  48. Chemistry 1200

    For each of these solutions, determine the boiling point of the solution 0.238 M glucose (C6H12O6) in water (Assume the density of the solution is 1.00 g/mL.)

    asked by Rukky on January 25, 2011
  49. Chem

    What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution?

    asked by Brittany on January 27, 2011
  50. Chemistry

    what is the molarity of a solution prepared by dissolving 222 g of sodium carbonate in enough water to make a solution volume of 3250 mL's?

    asked by Heather on July 9, 2010
  51. Chemistry

    A volume of 10.0 mL of a 0.00650 M solution of Cl- ions are reacted with 0.500 M solution of AgNO3. What is the maximum mass of AgCl that precipates?

    asked by Toni Jones on March 7, 2011
  52. Chemistry

    If 535 Ml of gaseous HCL, at 26.5 degrees Celsius and 747mm Hg, is dissolved in enough water to prepare 625 ml of solution, what is the PH of the solution?

    asked by ChemHurts on August 5, 2009
  53. Chemistry

    If 8.723 grams of sodium bicarbonate are dissolved in water to produce a 250.0mL solution, what is the morality of this solution?

    asked by Anonymous on October 10, 2016
  54. Chemistry

    If 8.723 grams of sodium bicarbonate are dissolved in water to produce a 250.0mL solution, what is the molarity of this solution?

    asked by Maegan on October 10, 2016
  55. chemistry

    A 10 ml of hydrochloric acid solution of concentration equal to 0.1 mol per litre is added 90 ml of pure water. What's the pH of the final solution?

    asked by wallace on September 16, 2018
  56. Chemistry

    If 87.3 mL of 0.225M KOH solution is mixed with 44.4 mL of 0.313M H2SO4 solution, would the resulting mixture be acidic, basic or neutral?

    asked by Mary on June 3, 2014
  57. chemistry

    A particular weak acid (HA) with a Ka of 2.0e-5 is 75% titrated with a strong base to produce a buffer solution. What is the pH of this final solution? Show all work.

    asked by Nicole on March 24, 2015
  58. chemistry

    I asked this before, but got no response. A) If you make up a solution of 250 mL of 0.1 M TRIS in the acid form, what will be the pH? B) If you add 2 mL of 1 M NaOH to the solution in part A, what will be the pH? Thanks.

    asked by student on February 3, 2008
  59. Chemistry

    0.15g of hydrogen chloride HCl is dissolved in water to make 8.0L of solution. What is the pH of the resulting hydrochloric acid solution?

    asked by Jonah on March 1, 2013
  60. Chemistry

    When 400ml of a 0.01M MgCl2 solution is mixed with a 300ml if a NaOH solution at pH 9.0, a precipitate will form. True or False?

    asked by Nick on April 9, 2018
  61. General Chemistry

    Titration between iodine and thiosulphate. Why starch solution has to be added when the solution just turned pale yellow, but not at the beginning of reaction?

    asked by ConfuseChem on November 30, 2012
  62. chemistry

    What is the molarity of the solution produced when 14.1 grams of ammonia is dissolved in sufficient water to prepare .100 liters of solution?

    asked by Drew on May 22, 2012
  63. CHEM

    HOW MCH VOLUME OF DECA MOLAR SOLUTION IS REQD 2 PEPARE 500ML OF SOLUTION WITH DENSITY 1.03G/ML & HAVING MASS% =40%.

    asked by AMIT on July 11, 2011
  64. chemistry

    How many milliliters of a 15.0%, by mass solution of KOH(aq) ( d= 1.14g/mL ) are required to produce 27.0 L of a solution with pH = 11.70? I'm really not sure how to do this, it's from Acids & Bases chapter. Any help is appreciated, thanks. (:

    asked by Agatha on February 22, 2009
  65. chemistry

    When you add 100ml of a 0.1M HCl solution to 200 ml of 0.4M NaOH solution what is the pH? can you please show detailed work. o don't understand this

    asked by jen on June 8, 2012
  66. Chemistry

    Will the 90-100 mL of distilled water added to the acid solution (10.00 mL) significantly change the moles of H3O+ in the 1.00 M HCl solution? Why or why not?

    asked by Ash on October 5, 2013
  67. Chemistry

    25.0CM OF A DILUTE HYDROCHLORIC ACID SOLUTION WAS NEUTRALIZED BY 18.8CM OF A SOLUTION OF SODIUM HYDROXIDE WITH A CONCENTRATION OF 0.12CM

    asked by LAABES on November 11, 2018
  68. Alg 1

    Completing the square: Which of the following is a solution x^2 + 14x + 112 = 0? If necessary round to the nearest hundredth. x= -0.24 x= -4.24 x= 4.24 no solution I worked it and got neither of the answers. I got x= 0.9 and x=-14.9. Where did I go wrong?

    asked by Jane on April 14, 2013
  69. ChemB

    A forming acid solution has a pH of 3.25. Which of these substances will raise the pH of the solution upon addition? Explain. A) HCl B) NaBr C) NaCHO2 D) KCl

    asked by ALISON on March 12, 2012
  70. Chemistry

    What volume of a 0.22mol/L hydrochloric acid solution is needed to cause the pH of 25.00mL of a 0.15mol/L lithium hydroxide solution to have a pH that s equal to 7.00

    asked by Amy on February 16, 2013
  71. Chemistry

    If I leve 750 mL of 3.6 sodium chloride solution uncoverd and 150 mL of the solvent evaporates overnight, what is the new solution concentration?

    asked by Emma on February 20, 2014
  72. chemistry

    What is the osmotic pressure in torr of a 0.0155 M glucose solution at body temperature ( 35.7 °C)? What are the boiling and freezing points for the same solution?

    asked by Ali on April 22, 2013
  73. Chem 2

    A solution is made by mixing 47.0 mL of ethanol, C2H6O, and 53.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C?

    asked by Pagye on July 14, 2012
  74. Chemistry

    How many milliliters of 0.540 M sodium sulfate solution would be needed to precipitate the calcium ion from 60.0 mL of 0.180 M CaCl2 solution?

    asked by Anonymous on November 8, 2016
  75. Chemistry

    Fe^3+(aq) + L (aq) ⇌ FeL^3+(aq) Kf= 4.68x10^25 A 1.00 L solution of 1.00g/L of Fe^3+(aq) has a 1.00 mol of L added. What is the equilibrium concentration of iron (III), (i.e., [Fe^3+]eq) in the final solution?

    asked by TS on August 18, 2018
  76. Chemistry

    what is the molarity of a solution prepared by dissolving 10.60g of Na2CO3 in enough distilled water to obtain 250.0ml of solution

    asked by Mr Lonnie on February 25, 2018
  77. Chemistry II

    A solution is made by mixing 38.0 mL of ethanol, C2H6O, and 62.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C?

    asked by Sam on July 17, 2012
  78. Chemistry

    You have 475 mL of an 0.47 M acetic acid solution. What volume (V) of 1.10 M NaOH solution must you add in order to prepare an acetate buffer of pH = 5.00?

    asked by Mark on January 19, 2013
  79. chemistry

    A solution is made by dissolving 0.10 mole of Na2SO4 in water to a final volume of 1.00 L. What is the molar concentration of Na+ ions in the solution?

    asked by Dolores Ramirez on April 5, 2013
  80. Basic Chemistry

    What is the molar concentration of Na+ in a solution prepared by dissolving 100.0g of Na3PO4 in sufficient H20 to form 2.00L of solution??

    asked by Steph on February 28, 2011
  81. CHEMISTRY

    0.15g of hydrogen chloride (HCl) is dissolved in water to make 6.5L of solution. What is the pH of the resulting hydrochloric acid solution?

    asked by Anonymous on February 17, 2014
  82. math

    Solve the equation for x. For each of the following problems is it possible for x to be equal to: 1? (x+m)/(x−1)=1 If m ≠ -1, there are no solutions\ if m=1, the solution is ? Ii do not now how to find the solution for if m=1 but i got all real

    asked by allie on December 18, 2016
  83. Chemistry-Please help

    Find the percent by mass of sodium chloride in a 1.45M NaCl solution. The density of the solution is 1.05g/mol .

    asked by Rose on October 5, 2009
  84. Science

    If pale green FeCl2 solution is left in the open for some time, will some of it gradually oxidise to become brown FeCl3 solution?

    asked by candy on January 31, 2009
  85. Chemistry

    Does the solid Zn(OH)2 dissolve when concentrated lye, NaOH solution, is added to a beaker containing a saturated solution of Zn (OH)2 and a small amount of Zn(OH)2?

    asked by Ron on May 5, 2010
  86. chemistry

    If 150.0 Ml of HCL solution are required to react completely with .35 moles of solid NaOH whats the molarity of the solution?

    asked by Aleander Azumah on October 12, 2009
  87. Chemistry

    What is the morality of a solution prepared by dissolving 10.60g of sodium trioxocarbonate (v) in enough distilled water to obtain 250.0 ml of a solution?

    asked by Charles on November 21, 2016
  88. chemistry

    How many milliliters of 0.50M NaOH solution are required to titrate 20.0mL of a 0.20M H2SO4 solution to an end point?

    asked by Anonymous on December 4, 2014
  89. Math Help PLEASE

    Solve the system of equations by graphing then classify the system as consistent and the equation as dependent or independent. 4x-y=26 4x+5y=-10 What is the solution of the system of Equations? (type am ordered pair Type N if there is no solution Type R if

    asked by Kell on May 6, 2008
  90. finace

    The 6 percent preferred stock of Mercer Livestock is selling for $62 a share. What is the firm's cost of preferred stock if the tax rate is 34 percent and the par value per share is $100? (Please calculate the arithmetic solution and show your work)

    asked by Sasha on January 12, 2012
  91. Chemistry

    Assuming that the specific heat of the solution is 4.18 J/(g⋅∘C) and that the calorimeter itself absorbs a negligible amount of heat, calculate ΔH in kilojoules for the reaction CaO(s)+H2O(l)→Ca(OH)2(aq) When 1.045 g of CaO is added to 50.0 mL of

    asked by Tyler on April 20, 2014
  92. Chemical Formulas and Reactions

    When aqueous copper(II)chloride reacts with aqueous ammonium phosphate, soluble ammonium chloride forms and copper(II) phosphate precipitates out of solution. 1. Write the balanced molecular equationfor this reaction. 2. Write the balanced complete ionic

    asked by chrissy on December 29, 2006
  93. Science

    Hello :) my name is Deqa, i was wondering if anyone knew the affects of a state of a substance on the reaction so generally speaking does it matter if a solid is dissolved in a solution or is it faster for a solution be added to another solution basically

    asked by Deqa on March 20, 2007
  94. Biology

    A student wishes to prepare 300 mL of 0.25 M sucrose. He puts 25.7 g of sucrose in a beaker and then adds 300 mL of dH2O. The total volume of the solution after the sucrose has been dissolved is 330 mL. a) What did he do wrong when preparing his solution?

    asked by Ki on September 14, 2014
  95. Chemistry Dr. Bob222

    Ok, UMMMM I thought I was good.. Till now.. Ok, For Cup C Mass of cup,water,stirrer: 55.15 Mass of sodium bicarbonate: 2.02g mass of citric acid: 0.77g total mass: 57.94g mass of cup,solution, stirrer after reaction: 57.64 difference (CO2): 0.30g Part B:

    asked by Jennie on March 3, 2015
  96. Moorpark

    Determine the concentration of NO3- in each of the following aqueous solutions. (Assume complete dissociation of each compound.) 0.30 M KNO3, 0.30 M Ca(NO3)2, 0.30 M Cr(NO3)3

    asked by Nicole on November 22, 2015
  97. Orgo

    Assume that during an extraction experiment you have lost track of which layer is the aqueous layer. How could you determine which layer is which by the use of a simple test?

    asked by Carrie on October 5, 2009
  98. Math

    How many ounces of 1% antifreeze solution must be added to 100 ounces of 40% antifreeze solution to obtain a 16% antifreeze solution? how do I set this equation up?

    asked by Mark on September 29, 2017
  99. Math

    Solution A is 80% Alcohol and Solution B is 30% Alcohol. How many Liters of each Solutions should be mixed in order to make 200 liters of a Solution that is 62% Alcohol ?

    asked by Wendy on April 16, 2009
  100. Chemistry

    In the reaction between H2O2 and I-, 15 mL of 0.30M KI, 65. mL of 0.10M H2O2 and 19 mL of 0.020M Na2S2O3 were mixed in a flask containing starch and buffer and the total volume was made up to 500mL with distilled water. The solution turned blue (indicating

    asked by Nikita on March 22, 2011

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