1. Chemistry

    Exactly 100 mL of 0.14 M nitrous acid (HNO2) are titrated with a 0.14 M NaOH solution. Calculate the pH for the following. (a) the initial solution (b) the point at which 80 mL of the base has been added (c) the equivalence point (d) the point at which 105

    asked by Tanya on March 17, 2012
  2. College Chemistry

    an iron ore sample was dissolved in Hydrochloric acid the iron was obtained as Fe2+. The solution was titrated with 41.08 mL of a 0.458 M solution of Ce+. Calculate the mass of iron in the original ore sample.

    asked by Laura on October 16, 2010
  3. Chemistry (check)

    Not sure if these are right 1) What is the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq) (base) and released 13093 J of heat? 13093/5= 2618.6 then convert to kj 2) Calculate the Molar

    asked by Mary on June 30, 2013
  4. Chem

    You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v). Ok, I think i'm

    asked by Britt on September 7, 2009
  5. Acids and Bases

    NaOH was added to 1.0 L of HI(aq) 0.40 M. Calculate H3O in the solution after the addition of .14 mol of NaOH. Calculate H3O in the solution after the addition of 0.91 mol of NaOH.

    asked by Kaitlyn on March 23, 2011
  6. Math

    A 12% solution and a 24% solution are to be mixed to create 80 mL of a 16% solution. How much of each should be used? Is the correct answer 53 1/3 L of the 12% solution and 26 2.3 of the 24% solution?

    asked by Alyonka on February 12, 2013
  7. science (chem)

    Aiieeee! Todays lab...good grief. I was supposed to dissolve 0.3g of impure sulfanilamide in enough ethyl alchohol (95%) and me and my partner did the lab together...sort of. She went and weighed 0.301g of impure sulfanilamide. Then she put some ethanol in

    asked by ~christina~ on September 4, 2007
  8. chemistry

    what are the solute particles present in boric acid (H3BO3)?

    asked by jade on March 12, 2012
  9. chemistry

    How many grams of solute are present in 785 mL of 0.480 M KBr?

    asked by Kate on March 29, 2012
  10. science

    if you had 2.00 moles of solute dissolved into 1.00 of solvent.whats the molality?

    asked by angela on September 15, 2008
  11. chemistry

    Why does a solute dissolve faster in hot water than cold?

    asked by Michelle on March 29, 2009
  12. chemistry

    Whats the solvent and solute in water vapor in air?

    asked by ying on February 25, 2010
  13. Chemistry II

    What is the process that occurs when solvent molecules surround a solute?

    asked by Lindsay on September 9, 2009
  14. Chemistry

    Why is a small amount of solute added in the electrolysis of water?

    asked by Chemo on March 12, 2012
  15. chemistry

    how many moles of solute is present in 40.0mL of 1.000 M of HNO3

    asked by Lauren on September 14, 2010
  16. anatomy/biology

    what substance passes through a cell membrane using a solute pump?

    asked by julie on September 10, 2009
  17. chemistry

    Mass (g) of solute in 179.8 mL of 0.267 M calcium acetate

    asked by Anonymous on October 7, 2014
  18. Chemistry

    How many grams of solute are present in 875 mL of 0.180 M KBr?

    asked by Katie on February 20, 2013
  19. Chemistry

    How many grams of solute are present in 795 ml of 0.130m KBr?

    asked by Ray on May 4, 2016
  20. Chemistry

    What is the solute-solvent interaction between silver nitrate in water?

    asked by Someone on November 11, 2016
  21. Chemistry II

    When dissolved in water, ammonium phosphate would have a value of __________ for i solute.

    asked by Lindsay on September 9, 2009
  22. Chemistry

    If you are making 230.0 mL of 2.70% (m/m) CuSO45 H2O, how many grams of the solute should you use?

    asked by Jade on September 11, 2013
  23. chemistry

    Molality is a unit of concentration that measures the moles of solute per

    asked by destiny on March 12, 2014
  24. College: Chem 1

    What would be the molar concentration of the solute in each of the following solutions? a. 0.50 L containing 38.6 g of NaClO4 b. 0.25 L containing 41.5 g of C4H8O

    asked by Anonymous on October 8, 2013
  25. chemistry

    How many grams of solute are present in 205 mL of .340 M KBr?

    asked by Jason on November 22, 2010
  26. chemistry

    2L of 2M solute of HCI must be diluted to an 1M concentration. What will the final volume be after ?

    asked by denice on July 30, 2010
  27. chemistry

    how many grams of solute are in 135 mL of 0.100 M potassium bromide

    asked by Anonymous on March 4, 2010
  28. Biochemistry

    Can someone help me calculate protein concentration using the Bradford Assay? If you could show me how to do tube 2, that'd be great. Tube 1: 0 ul Protein Stock Solution, 800 ul Water, 0 ug Protein, Absorbance @595nm = 0 Tube 2: 10 ul Protein Stock

    asked by OR on October 7, 2013
  29. chemistry

    A student prepares a solution of hydrochloric acid that is approximately 0.1 M and wanted to determine its precise concentration. A 25.00 mL portion of the HCl solution is transferred to a flask, and after a few drops of indicator are added, the HCl

    asked by walter on June 14, 2015
  30. Chemistry

    A solution is prepared by mixing 0.12 L of 0.12 M sodium chloride with 0.22L of a 0.19M MgCl2 solution.What volume of a 0.22 M silver nitrate solution is required to precipitate all the Cl- ion in the solution as AgCl ?

    asked by Abril on March 13, 2010
  31. medicine

    What is final concentration of a mixed solution combining 50ml of 20% solution, 150 ml of a 15% solution and 200 ml of a 35% solution?

    asked by Lisa on July 20, 2010
  32. Chemistry

    If solution A had a pH of 8, and solution B had 1,000 times this hydrogen ion concentration what would be the pH of solution B, and would solution B be acidic or basic?

    asked by Kristin on November 14, 2011
  33. Science

    Three acids solutions have the following pH: Solution A: pH = 2 Solution B: pH = 5 Solution C: pH = 3 Which solution is made with the acid that has the smallest ionization constant?

    asked by Megan on June 30, 2011
  34. chemistry

    Help with Beer's Law lab experiment question! So we were told to calculate the concentration of 5 standard solutions but I don't know how to do that exactly. The Concentration of the solution in flask B was .0024 M and our lambda max (max absorption) was

    asked by Anonymous on September 6, 2010
  35. Chemistry

    At a certain temperature the vapor pressure of pure benzene is measured to be 322. torr . Suppose a solution is prepared by mixing 138.g of benzene and 91.2g of heptane . Calculate the partial pressure of benzene vapor above this solution. 3 sig figs!

    asked by Elizabeth L. on April 11, 2012
  36. chemistry

    calculate the molarity of a g NaCl in 250 ml solution.

    asked by Zach on November 25, 2014
  37. chemistry

    Calculate the pH of a 0.063 M (C2H5)2NH solution (Kb = 1.3 10-3).

    asked by melissa on November 24, 2011
  38. chemistry

    Calculate the pH after 0.15 mol of NaOH is added to 1.00 L of the solution that is 0.50 M HF and 1.01 M KF

    asked by kyle on March 25, 2011
  39. General chemistry

    Calculate the molarity of 500.0 ml solution containing 26.5g Na2CO3

    asked by Chin on January 23, 2017
  40. Chemistry help plz

    How to calculate the hydronuim ion cencentration of solution with a pH of 2.5?

    asked by Tarkan on December 23, 2010
  41. Chemistry

    calculate [H] and [OH] for a .01M calcium hydroxide solution?

    asked by Morgan on May 20, 2012
  42. chemistry

    Calculate the pH of a saturated solution of Sr(OH)2. The Ksp for Sr(OH)2 is 3.2x10^-4.

    asked by Aly on February 15, 2015
  43. chemistry

    The pH of a solution is measured to be 5.4. Calculate the following: a) [H3O^+] b)pOH c)[OH^-]

    asked by Jay on June 28, 2010
  44. Chemistry

    Calculate the pH of a 0.053 M (C2H5)2NH solution (Kb = 1.3 10-3).

    asked by Kaleen on November 23, 2011
  45. Chemistry

    Calculate the concentration of all species in a 0.240 solution.

    asked by Anonymous on March 27, 2012
  46. chemistry

    Calculate the molarity of each of the following solutions. 1. 61.9 g of C2H6O in 3.4 L of solution

    asked by Abby on March 9, 2011
  47. chemistry

    calculate the % m/m concentration of 2g sugar in 80g solution

    asked by faye on November 26, 2010
  48. Chemistry

    Calculate the mass percent of a solution containing 10.5 of and 91.5 of H2O.

    asked by Dax on November 24, 2012
  49. chemistry

    Calculate the pH of a 0.87 M NaCN solution. Solve it exactly (no assume x=0.1)

    asked by Justin on March 20, 2012
  50. Chemistry

    Calculate the concentration of OH¯ ions in a 1.4*10^-3 M HCl solution

    asked by Sara on February 15, 2011
  51. Chemistry

    Calculate the pH of a buffer solution that contains 0.60 M NaH2PO4, and 0.26 M Na2HPO4.

    asked by Maddie on April 14, 2013
  52. chemistry

    Calculate the pH of a 0.35 M solution of dimethylamine, (CH3)2NH.

    asked by donna on December 7, 2009
  53. Science

    calculate the solubility of NaCl in a solution which contains 0.1 M CaCl2

    asked by Tejpal Chandrakar on October 12, 2012
  54. chemistry

    Calculate the hydroxide ion concentration of a solution with pH = 8.25.

    asked by Ciaria on March 11, 2015
  55. Science

    Calculate the molarity of 10 % HNO3 (w/w) solution if its density is 2.0 g/cc at 25° C.

    asked by satyam kar on October 2, 2016
  56. chemistry

    im so confused about this question Calculate the pH of a solution that has [H3O+] = 5.5 x 10-3.

    asked by joe on April 29, 2013
  57. CHEMISTRY

    CALCULATE THE MOLARITY OF 50.0g OF NaCL IN 7820mL OF SOLUTION

    asked by DAD on December 4, 2013
  58. Chemistry 151

    Calculate the concentration in g/dm3 of HNO3 in solution A. (H=1; N=14; O=16; Na=23)

    asked by Esther on April 10, 2017
  59. ap chemistry

    Calculate the ratio of [NH3]/[NH4+] that gives a solution of pH = 10.60.

    asked by gabriella on February 4, 2014
  60. Ap chem-Bases

    Calculate the pH of a 0.2M solution of Triethylamine, (C2H5)3N, with a Kb of 4.0x10^-4

    asked by Jessica on February 17, 2014
  61. Chemistry

    A 0.39 M solution of a weak acid is 3.0% dissociated. Calculate Ka.

    asked by Kaleen on November 23, 2011
  62. Chemistry

    A solution of NH3 in water has a pH of 11.17. Calculate it's molarity

    asked by Rita on October 18, 2015
  63. science

    Calculate pH of 0.01 M CH3COONa solution if pKa of CH3COOH is 4.74.

    asked by kartikaya on January 7, 2013
  64. chemistry

    Calculate the molarity of 2.05 L of a solution containing 1.51 g of dissolved KBr

    asked by jessica on February 9, 2012
  65. Chemistry

    Calculate the [H], [OH], pH and the pOH of this solution; 0.0025 M NaOH

    asked by Shane on June 19, 2013
  66. Chemistry

    Calculate the molarity of 17.g of NaCl in 881 ml of solution

    asked by Alexa on April 13, 2014
  67. Chemistry

    Calculate the[OH-] of a solution of 0.1861M CH3CH2CH2NH3CL if Kb= 5.1*10-4 for CH3CH2CH2NH2

    asked by Jude on April 16, 2011
  68. Chemistry

    Calculate [H3O] for a solution of hydrochloric acid that is: pH=2.00 pH=3.00

    asked by Gayla on April 26, 2009
  69. Ap chem-Bases

    Calculate the pH of a 0.2M solution of Triethylamine, (C2H5)3N, with a Kb of 4.0x10^-4

    asked by Jessica on February 16, 2014
  70. chemistry

    1)Calculate the pH of a 0.10 M NaHX salt solution. Ka (H2X) = 2.1 x 10-2 Ka (HX-) = 4.5 x 10-8 2)Calculate the pH of a 0.10 M NaHX salt solution. Ka (H2X) = 5.3 x 10-5 Ka (HX-) = 5.3 x 10-11

    asked by yahn on October 21, 2011
  71. chemistry

    Calculate the pH of a solution containing 10 g / L of NH4Cl (Kb NH3 = 1.8x10-5

    asked by Anonymous on July 5, 2016
  72. Chemistry

    Calculate the molarity of 15.4 g of ethanol (C12H22O11) in 71.0 mL of solution

    asked by Kiana on February 27, 2011
  73. chemistry

    Calculate the molality of a 10% H3PO4 solution in water.

    asked by Keva on October 11, 2011
  74. Chemistry

    Calculate the pH of a solution that is 2.00 M HF, 1.00 M NaOH, and 0.704 M NaF. (Ka = 7.2 E -4)

    asked by Schanee on December 17, 2008
  75. chemistry

    these is 0.1M HCl of 100ml of that solution in a beaker,calculate pH?

    asked by kabelo on February 12, 2011
  76. AP Chemistry

    calculate the ph of a 0.10 M CoCl3 solution. The ka value for Co(H20)6 is 1.0x10^-5

    asked by Anonymous on February 25, 2010
  77. chemistry

    Calculate the pH of a 0.10 M NaHX salt solution. Ka (H2X) = 2.1 x 10-2 Ka (HX-) = 7.3 x 10-8 Calculate the pH of a 0.10 M NaHX salt solution. Ka (H2X) = 9 x 10-5 Ka (HX-) = 5.3 x 10-11

    asked by Anonymous on March 11, 2012
  78. Chemistry

    What is the osmolality of 1.1% NaCl salt solution? How can I calculate this?

    asked by Mirza on April 27, 2016
  79. chemistry

    calculate the concentration of ammonium nitrate solution.

    asked by Anonymous on August 17, 2014
  80. chemistry

    Calculate the pH of a 2.5x10-5 M lithium hydroxide solution.

    asked by Liz on May 2, 2012
  81. chemistry

    Calculate the H3O^+ and OH^- ion concentrations in a solution that has a pH of 3.72.

    asked by Maria on February 26, 2011
  82. chemistry 12u

    how do i calculate this.. a solution of nitrous acid has a pH of 2.73 what is the [H3O+] ?

    asked by julie on May 10, 2016
  83. chemistry

    I am doing a home lab experiment about acid-base neutralization. I just need a little help to see if I am doing it correctly. I completed the experiment and recorded the data. We were to add 25 ml of vinegar and the 1 ml of cabbage indicator, the add i ml

    asked by Lynn on March 6, 2010
  84. Chemistry

    7.5 g of a solid are added to 87.6g of water at 23.7 degrees C. When the solid has all been dissolved and thoroughly mixed with the water, the temperature of the solution is decreased by 6.2 degrees C. Calculate the heat of the solution in joules per gram

    asked by Anonymous on July 15, 2008
  85. chemistry HELP

    a flask containing 50ml of 0.128M sodium acetate is titrated with 0.138M nitric acid. Calculate the initial ph of the acetate solution and calculate the ph after the addition of 24.9ml of nitric acid. pKa for acetate 4.757

    asked by amy on April 27, 2017
  86. Chemistry

    A 0.1873 g sample of a pure, solid acid, H2X was dissolved in water and titrated with 0.1052 M NaOH solution. The balanced equation for the neutralization reaction occurring is H2X(aq) + 2NaOH(aq) ¨ Na2X(aq) + 2H2O(l) If the molar mass of H2X is 85.00

    asked by Lauren on May 11, 2011
  87. Chemistry

    When a concentrated NaCl aqueous solution is electrolyzed, what is the reason for the stabality of the products to be lesser stable as of thermodynamically, with respect to the reactants? Is it because the products are gasses? H20(l) +4e--->H2(g) +

    asked by Shenaya on June 19, 2017
  88. chemistry

    hello, I have done a acid & base titration lab, with 0.1M vinegar (with unknown %tage acid) and 0.1 NaOH...I think the result came out ok, in avg, 25.21mL of NaOH have titrated w/ 30.0mL unknown %tage acid of vinegar. all I am given is Density of vinegar=

    asked by J Kang on May 28, 2008
  89. Chemistry

    Calculate the pH after 0.016 mole of NaOH is added to 1.05 L of a solution consisting of 0.138 M HONH2 and 0.127 M HONH3Cl, and calculate the pH after 0.016 mole of HCl is added to 1.05 L of the same solution of HONH2 and HONH3Cl. (Assume that all

    asked by Margaret on March 13, 2013
  90. Chemistry

    In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3 -, and bromide ion, Br-, according to the following chemical equation. 3BrO-(ag) → BrO3 -(ag)+2Br-(ag) A plot of 1/[BrO-] vs. time is linear and the slope is equal to 0.056

    asked by Jason on February 19, 2011
  91. Chemistry lab

    A 1.340gram sample of an unknown acid, H3A, was placed in a 250.0 mL volumetric flask and diluted to volume with water. A 45.35 mL sample of this acid solution was titrated with 37.77 mL of a 0.1006M NaOH solution. A) Using one set - up dimensional

    asked by Stacy on March 22, 2016
  92. Chemistry

    A zinc-copper battery is constructed as follows. Zn | Zn2+ (0.70 M) || Cu2+ (2.30 M) | Cu The mass of each electrode is 200. g. (a) Calculate the cell potential when this battery is first connected. 1 V (b) Calculate the cell potential after 10.0 A of

    asked by Amy on March 29, 2009
  93. chemistry(check my answer)

    A. lower than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstructon by solute particles.. B. higher than the freezing point of the solvent alone because higher

    asked by phys on April 1, 2010
  94. ALGEBRA

    A chemist is asked to make 10 liters of a a35% solution. She has only a 10% solution and a 50% solution to work with. how much of each solution must she mix to ge 10 liters of the 35% solution?

    asked by jackie on January 28, 2012
  95. Chemistry

    A solution is prepared by dissolving 25.0 g of pure HC2H3O2 and 25.0 g of NaC2H3O2 in 700 mL of solution (the final volume). (a) What is the pH of the solution? (b) What would the pH of the solution be if 65.0 mL of 0.650 M NaOH were added? (c) What would

    asked by Dean on February 21, 2015
  96. chemistry

    to find the molarity of an aqueous solution of an ionic solid what do you need to know? a... mass of solid, formula of solid, volume of water b...moles of solid, formula of solid, volume of water c....mass of solid, formula of solid, volume of solution

    asked by Anna on November 30, 2010
  97. science

    solution A was prepared by dissolving 0.63g of HNO3 in 100cm3 solution. Solution B is a sodium calcium hydroxide solution of unknown concentration. state a balanced chemical equation for the reaction

    asked by Zoe on August 25, 2015
  98. CHEM

    am lost. I have to create a buffer using NH4CL and 0.10 M NH3. I have to chose how much of the reagent to use in order to get a concentration between 0.01 and .5 M. Then after I come up with the recipe for that I have to calculate the pH based on the

    asked by Erica on April 5, 2016
  99. Chemistry

    An aqueous solution of ammonium nitrite decomposes when heated to give off nitogen gas and water. This reaction can be used to prepare pure nitrogen gas. How many grams of ammonium nitrite must have reacted if 3.75 liters of nitrogen gas was colleced over

    asked by Anonymous on October 20, 2014
  100. chemistry

    Calculate the pH from the addition of 10 mL of a 0.10 M NaOH solution to 90 mL of 0.10 M HCl. okay so i understand how to do most of it but i get messed up at one part.. so i made my equation: NaOH + HCl -> H2O + NaCl (strong base, strong acid= complete

    asked by BOB PLEASE HELP!:) on November 8, 2011

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