1. Chemistry

    The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)? A) 0.40 M B) 0.10 M C) 0.20 M D) 0.25 M E) 0.36 M The answer is supposedly C, but I got A.
  2. Chemistry

    The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
  3. chemistry

    The neutralization of 27.3 mL of an unknown concentration H2SO4 solution requires 72.2 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
  4. chemistry

    The neutralization of 27.3 mL of an unknown concentration H2SO4 solution requires 72.2 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
  5. chemistry

    The neutralization of 27.3 mL of an unknown concentration H2SO4 solution requires 72.2 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
  6. Chemistry

    In a silphuric acid (H2SO4)-Sodium Hydroxide (NaOH) acid-base titration, 17.3mL of 0.126M NaOH is needed to neutralize 25mL of H2SO4 of unknown concentration. What is the morality of the H2SO4 solution? H2SO4 (aq)+ NaOH (aq) = Na2SO4 (aq) + H2O (l)
  7. General Chemistry

    A 15.0 ml sample of unknown HCL04 solution requires titration with 25.3 ml of 1.200 M NaOH to reach equivalence point. what is the unknown concentration?
  8. chemistry

    You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured
  9. College Chemistry

    You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured
  10. Chemistry

    Suppose 50.0 mL of an aqueous solution containing an unknown monoprotic weak acid is titrated with 0.250 M KOH. The titration requires 31.52 mL of the potassium hydroxide solution to reach the equivalence point. What is the concentration (in molarity) of
  11. chemistry

    A 27.00mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1422M KOH solution. A volume of 40.22mL of KOH was required to reach the equivalence point. What is the concentration of the unknown H2SO4 solution? Any help would be
  12. Chemistry, pH, Buffers

    Please help!! Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final acid solution 3.49 Show me how do I calculate the Ka of the
  13. Chemistry, Buffers, pH

    Hi could someone please help me in the next 5 minutes with this question: Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final
  14. Chemistry

    A 25.00-mL sample of an H2SO4 (2 and 4 are subscripted) solution of unknown concentration is titrated with a .1328 M KOH solution. A volume of 38.33 mL of KOH was required to reach the endpoint. What is the concentration of the unknown H2SO4 (again, the 2
  15. Chemistry

    A 25.00-mL sample of an H2SO4 (2 and 4 are subscripted) solution of unknown concentration is titrated with a .1328 M KOH solution. A volume of 38.33 mL of KOH was required to reach the endpoint. What is the concentration of the unknown H2SO4 (again, the 2
  16. Chemistry

    During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an unknown concentration of sodium hydroxide (NaOH). What is the concentration of the sodium hydroxide solution? The answer I got
  17. Chemistry

    During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an unknown concentration of sodium hydroxide (NaOH). What is the concentration of the sodium hydroxide solution?
  18. chemistry

    A 13.0 mL sample of an unknown HClO4 solution requires titration with 25.2 mL of 0.180 M to reach the equivalence point. What is the concentration of the unknown HClO4 solution? The neutralization reaction is as follows: HClO4 +NaOH ===>> H2O +NaClO4
  19. Chemistry

    15.00mL sample of a solution of H2SO4 of unknown concentration was titrated with 0.3200 N NaOH. The titration required 21.30mL of the base. What was the normality of the acid solution? what was the molarity of the acid solution?
  20. Chemistry:Important!!!!!!!

    20.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 39.13 mL of a 0.1061 M NaOH solution. What is the concentration of the H2SO4 solution?
  21. science

    I am doing a titration lab and need help with a problem. (i used .100M H2SO4)(I used 10.0 ml of Ba(OH)2 solution and added 50.0 ml of distilled water making 60.0 ml total.) 1. Use the titration results to calculate the moles of H2SO4 that were used to
  22. Chem

    A 20.00−mL sample of an unknown HClO 4 solution requires titration with 22.92mL of 0.2200M NaOH to reach the equivalence point. What is the concentration of the unknown HClO 4 solution? The neutralization reaction is: HClO 4 (aq)+NaOH(aq)¨H 2
  23. Chemistry

    You have a solution of 0.15M Ba(OH)2 and a solution of H2SO4 whose concentration you want to determine. You start with 25 ml H2SO4 in the Erlenmeyer and titrate in the Ba(OH)2. At the end of the titration, you find that you have used 20.4 ml Ba(OH)2 and an
  24. chemistry

    You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured
  25. Chemistry

    A 20.0 ml sample of an unknown HCl solution requires titration with 15.0ml of 0.1MNaOH solution to reach equivalent point. What is the concentration of the HCl solution? HCl + NaOH ¨ H2O + NaCl A. 0.000075 B. 75 C. none of these D. 0.075
  26. General Chemisty

    42.55mL of a standardized 1.005 M NaOH solution was necessary to exactly neutralize 30.0mL of an aqueous H2SO4 solution of unknown concentration. What is the molarity of the H2SO4 solution?
  27. chemistry

    The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of
  28. Chemisty

    A 25-mL sample of 0.160M solution of NaOH is titrated with 17 mL of an unknown solution of H2SO4. What is the molarity of the sulfuric acid solution? A. 0.004M H2SO4 B. 0.235M H2SO4 C. 0.117M H2SO4 D. 0.002M H2SO4
  29. AP Chemistry

    CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be
  30. chemistry

    CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be
  31. chemistry

    When the glucose solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level rises. Based on this information, what can be said about these two solutions? a.) The unknown solution had the lower
  32. chemistry

    When the glucose solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level rises. Based on this information, what can be said about these two solutions? a.) The unknown solution had the lower
  33. chemistry

    10.0 mL of a Cu2+ solution of unknown concentration was placed in a 250 mL Erlenmeyer flask. An excess of KI solution was added. Indicator was added and the solution was diluted with H2O to a total volume of 75 mL. The solution was titrated with 0.20 M
  34. chemistry exercises

    The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of
  35. chemistry

    5.0 mL of H2SO4 solution was titrated with 0.20 M NaOH standard solution. The volume of NaOH needed to reach the equivalent point was 9.5 mL. 1. In this titration setup, what is the titrant? and what is the analyte? 2. What is the number of mole of H2SO4
  36. Chemistry

    I there, this is my lab worksheet, I am having trouble filling it out. Please help me with it. Expt #1- Molecular Weight of Unknown Acid Unknown Acid: #3 Mass of Unknown solid acid transferred:1.0g Volume of volumetric flask: 100.00 mL Concentration of
  37. chemistry

    A 31.5 ml aliquot of H2SO4 of an unknown concentration was titration with 0.0134 M NaOH. write the balanced chemical reaction with the correct states of matter.
  38. chemistry

    A 31.5 ml aliquot of H2SO4 of an unknown concentration was titration with 0.0134 M NaOH. write the balanced chemical reaction with the correct states of matter.
  39. Chemistry

    A 0.750 g sample of an unknown solid is dissolved in 100 mL of water and acidfied with 25 mL of 3 M H2SO4 then titrated with a 0.0200 M KMnO4 solution. If the unknown solid requires 12.5 mL of the KMnO4 solution to reach the endpoint, what is the % sodium
  40. Chemistry

    Expt #1- Molecular Weight of Unknown Acid Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from
  41. Chemistry

    The approximate concentration of a hydrochloric acid solution is 0.5M. The exact concentration of this solution is to be determined by the titration with 0.5M solution of sodium hydroxide. A 10.00 ml of HCl solution was transferred by pipet to an
  42. Chemistry

    The student used the KHP in a subsequent titration experiment where he titrated 25.00 +/- 0.03 ml of the acid against an unknown solution of NaOH. The titration required 23.70 +/- 0.10 ml of the base. What is the concentration of NaOH?
  43. Chemistry

    Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from titration: 13.9 mL Here's where I need help: No of
  44. Chemistry

    -A sample consist 90% NaOH and 10% CaO,whats the concentration of NaOH in the solution of this 3g sample,dissolved in 250cm3. -How many cm3 of H2SO4 with concentration of 0.255M are needed for titration of 100cm3 of this solution
  45. Chemistry

    Consider a solution containing 4.35 mM of an analyte, X, and 1.09 mM of a standard, S. Upon chromatographic separation of the solution peak areas for X and S are 3251 and 10075, respectively. Determine the response factor for X relative to S. F=? To
  46. Chemistry

    The densities of three solutions with known concentrations ( 20% , 50%, and 70%), and one unknown solution were determined. If the densities of 20%, 50% and 70% solutions are 0.69 and 0.58 and 0.49 g/mL, respectively, and the denisty of the unknown
  47. Chemistry

    I need help on these three questions. For all three of them you're supposed to write a balanced equation for each neutralization. Then, to find the concentrations of the unknown solutions if the following reactions are found to reach equivalence by
  48. institute of health sciences

    Chemistry A) determine the mass of sodium hydroxide needed to prepare 100ml of 0.5M standard solution B) describe the procedure used to prepare the standard solution C) use the 100ml stock solution of 0.5M sodium hydroxide to neutralize H2SO4 by volumetric
  49. Chemistry

    40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 5.10. What was the concentration of the original acetic acid solution? (Ka(CH3COOH) = 1.8
  50. Chemistry

    40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 5.10. What was the concentration of the original acetic acid solution? [Ka(CH3COOH) = 1.8
  51. Chemistry

    A 11.0-mL sample of an unknown H3PO4 solution requires 116mL of 0.140 KOH to completely react with the H3PO4. What was the concentration of the unknown H3PO4 solution (answer in M). H3PO4(aq) + 3KOH(aq) --> 3H2O(l) + K3PO4(aq)
  52. chemistry

    The densities of three solutions with known concentrations ( 20% , 50%, and 70%), and one unknown solution were determined. If the densities of 20%, 50% and 70% solutions are 0.69 and 0.58 and 0.49 g/mL, respectively, and the denisty of the unknown
  53. Chemistry

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of H2SO4?
  54. Chemisry

    The amount of I3–(aq) in a solution can be determined by titration with a solution containing a known concentration of S2O32–(aq) (thiosulfate ion). The determination is based on the net ionic equation Given that it requires 32.9 mL of 0.330 M
  55. Chemistry

    When 25.3 mL of 0.100 M NaOH was reacted with 18.8 mL of H2SO4 of unknown molarity, the final solution was 0.029207 M in H2SO4. What is the molarity of the original H2SO4 solution? The equation for the reaction is: 2 NaOH + H2SO4 → Na2SO4 + 2 H2O
  56. Chem

    1. What is the molarity of a copper(II) dihydroxide [Cu(OH)2] solution if 25.25 mL of the solution is titrated to the equivalence point with 36.18 mL of 0.549 M prussic acid [H(CN)]? 2. What volume of a 0.138 M dihydroxyl base solution is needed to
  57. Chemistry

    In a titration experiment 34.12 mL of 0.902 M KOH is reacted with H2SO4. The endpoint is reached when 50.46 mL of the acid is mixed with the base. What is the molar concentration of the acid? I'm having a hard time even starting this problem, since I don't
  58. Chem

    Please tell me if these are right! 1.How many milliliters of 0.215 M NaOH solution are needed to completely neutralize 2.50 ml of 0.825 M H2SO4 solution? I got 19.2 ml 2. A 10.0-ml sample of vinegar which is an aqueous solution of acetic acid HC2G3O2
  59. Chemistry HELP!

    In order to standardize a KMnO4 solution, 0.3498 g Na2C2O4 was dissolved in 30 mL water and 15 mL 3.0 M H2SO4. The KMnO4 solution was added to the Na2C2O4 solution until a pale pink color persisted. The titration took 29.5 mL of KMnO4 solution. What is the
  60. Chemistry HELP!

    In order to standardize a KMnO4 solution, 0.3498 g Na2C2O4 was dissolved in 30 mL water and 15 mL 3.0 M H2SO4. The KMnO4 solution was added to the Na2C2O4 solution until a pale pink color persisted. The titration took 29.5 mL of KMnO4 solution. What is the
  61. chemistry

    It requires 23.2 mL of 0.250 M KOH to titrate 49.0 mL of an HCl solution of unknown concentration. Calculate the initial HCl concentration.
  62. Chemistry

    It requires 17.9 mL of 0.120 M KOH to titrate 78.0 mL of an HCl solution of unknown concentration. Calculate the initial HCl concentration.
  63. Chemistry

    It requires 25.1 mL of 0.110 M HCl to titrate 12.0 mL of an NaOH solution of unknown concentration. What is the NaOH concentration?
  64. Chemistry

    Calculate the pH of a solution at the endpoint of a titration involving 25.00 mL of CH3COOH at unknown concentration, and 21.40 mL of 0.100 M NaOH
  65. AP CHEM

    Please help me with thses AP CHEM homework problems and show the steps to how to find the solutions: Solid Liquid Titrations: Determine the concentration of the indicated liquid unknown given the mass of a solid standard and the buret data for the
  66. ChemistryDrBob222

    Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage
  67. 11th grade CHEMISTRY TITRATION LAB!

    i have a tritation lab due tomorrow and i am stumped on a couple things. its a titration lab using sodium hydroxide (NaOH)- 250 mL 0.300 M concentration, 10 mL of an unknown substance of vinegar, the avg. of titrated NaOH in the flask with vinegar is 27.7
  68. Chemistry

    Lab: Titration of NaOH (0.1 molar)to unknown solid acid. Trying to determine the equilivent weight of the unknown acid in the experiement. I am trying to figure out if I add too much base solution by accident to an unknown acid during titration would it
  69. chemistry

    what is the molarity of an unknown HCI concentration if it requires 75ml of a 0.2 M NaOH solution?
  70. Chemistry

    Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage
  71. Chemistry

    In a titration experiment, 15.0 mL of 0.10 M Ba(OH)2 is required to titrate a 10.0 mL of an unknown solution of HNO3. Calculate the concentration of the HNO3 solution using the data. 2HNO3 + Ba(OH)2 ® Ba(NO3)2 + 2H2O
  72. Chemistry

    Calculate the molarity of the H2SO4 solution if 17.45 mL of NaOH was necessary to reach the endpoint of titration. The molarity of the NaOH solution was 0.425 M and 26.30 mL of H2SO4 was added to the Erlenmeyer flask. H2SO4(aq) + 2 NaOH (aq) ----->
  73. chemistry

    n order to determine the concentration of bivalent nickel in environmental samples we can use the complexometric titration. A 100 mL sample containing Ni2 + was treated with 50 mL of 0.02 mol / L EDTA solution complexing all Ni2 + solution and leaving an
  74. Chemistry-Titration

    Acid (Unknown) Solution: HCL Molar Ratio: 1:1 Volume:20 ml Concentration:? Base(Known) Solution: NaOH Molar Ratio 1:1 Volume 26 ml Concentration:0.1
  75. chemistry

    A titration of 15.75mL HCL of an unknown molarity requires 20.35mL of 0.0903M NaOH solution. What is the molarity of the HCl solution?
  76. chemistry

    What is the concentration of NaOH? using this solution (0.04756 M (i think its stand for Molarity) H2SO4) what is the concentration of NaOH in 10.00 ml of a solution, titrate to an end point using 24.22 ml of acid? formula that was given is (H2SO4 + 2NaOH
  77. chemistry

    A 15.0 ml sample of an unknown HClO4 solution requires 50.3 ml if 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+ NaOh(aq)yields H2O(l)+ NaClO4 (aq) If anyone
  78. chemistry

    A 15.0 ml sample of an unknown HClO4 solution requires 50.3 ml if 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+ NaOh(aq)yields H2O(l)+ NaClO4 (aq) If anyone
  79. chemistry

    A 15.0 ml sample of an unknown HClO4 solution requires 50.3 ml if 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+ NaOh(aq)yields H2O(l)+ NaClO4 (aq) If anyone
  80. 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
  81. Chemistry

    In a titration 100 mL of 3.65 g HCl is added to 200 mL of BA(oh)2 solution of an unknown concentration until the equivalent point find molarity of ba(oh)2
  82. Chemistry

    If a chemist titrates 300.0 mL of H2SO4 with a 3.0 M solution of NaOH and requires only 3.4 mL of the base to reach the endpoint, what is the concentration of the sulfuric acid?
  83. Chemistry

    If a chemist titrates 300.0 mL of H2SO4 with a 3.0 M solution of NaOH and requires only 3.4 mL of the base to reach the endpoint, what is the concentration of the sulfuric acid?
  84. Chemistry

    If a chemist titrates 300.0 mL of H2SO4 with a 3.0 M solution of NaOH and requires only 3.4 mL of the base to reach the endpoint, what is the concentration of the sulfuric acid?
  85. chem

    A 27.4 mL sample of an unknown HClO4 solution requires 45.4 mL of 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is shown below. HClO4(aq) + NaOH(aq) H2O(l) + NaClO4(aq)
  86. Chemistry

    Consider 18.0 M H2SO4, if you need to make 250.0 mL of a 3.0 M solution of H2SO4, how would you do this? 18.0 M H2SO4 has a density of 1.84g/mL what is the molality of solution? Mass % of H2SO4 in the solution and the mol fraction of H2SO4 and water in the
  87. chemistry

    Consider 18.0 M H2SO4, if you need to make 250.0 mL of a 3.0 M solution of H2SO4, how would you do this? 18.0 M H2SO4 has a density of 1.84g/mL what is the molality of solution? Mass % of H2SO4 in the solution and the mol fraction of H2SO4 and water in the
  88. analytical chemistry

    DrBob222, it is me again. Continue the question 5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL,
  89. chem

    A 0.050 L solution of H2SO4 requires 200.0 mL of 4.0 M NaOH for phenophthalein to turns pink to colorless. What is the molarity of the original H2SO4 solution? I got 4M but my instructor said it's 8M how did he get that? Pls need help figuring it out.
  90. chem

    A 26.8 mL sample of an unknown HClO4 solution requires 46.8 mL of 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is shown below. HClO4(aq) + NaOH(aq) H2O(l) + NaClO4(aq) i got
  91. chemistry

    why do you need to construct a calibration curve when doing spectrophotometric determinations? Is it not possible to obtain the concentration of the unknown solution by simply getting the extinction coefficient of the species under study and then determine
  92. Chemistry

    I really need help with this question. If 2 trials using 10.0 mL of a solution with an unknown concentration were titrated using close to 20mL of a standard solution each trial, what approximate volume of the standard solution would be needed to titrate
  93. Chemistry

    A 5.00-mL sample of a sulfuric acid solution of unknown concentration is titrated with a 0.1401 M Sodium Hydroxide solution. A volume of 5.99 mL of the base was required to reach the endpoint. What is the concentration of the unknown acid solution? Write
  94. chemistry

    You were given 25.00 ml of an acetic acid solution of unknown concentration. You find that it requires 29.60 ml of a 0.1050 M NaOH solution to exaclty neutralize this sample. A) What is the molarity of the acetic acid solution? B) what is the percentage of
  95. chemistry

    this is a really long question. i don't understand how to answer it. help please. A 10.0% aquueous solution of sulfuric acid has a density of 1.0661 g/mL at 20 degrees celsius. A. how many grams of H2SO4 are found in 50.0 g of this solution? B. how many
  96. Chemistry (Titrations)

    In order to standardize a KMnO4 solution, 0.2848 g Fe(NH4)2(SO4)2·6H2O was dissolved in 25 mL 0.18 M H2SO4. The KMnO4 solution was added to the Fe(NH4)2(SO4)2·6H2O solution until a pale pink color persisted. The titration took 24.2 mL of KMnO4 solution.
  97. Chemistry

    What effect on the molar mass of the unknown acid would each of the following have-that is-would it make the calculated molar mass high, low, or would it have no effect? 1. Adding 5 drops of phenolphthalein instead of 1 drop. 2. Using a standard NaOH
  98. chemistry

    if .5 g of a KHP containing unknown mixture requires 7 mL of NaOH to reach the endpoint of titration, what mass of the unknown should be weighed out to consume 20 mL of the NaOH. If anyone could help me start this that would be appreciated. Thanks!
  99. Chemistry

    In a titration experiment involving an unknown concentration of HCl and a 0.100M solution of NaOH(aq), it was determined that it took 12.5mL of NaOH to neutralize 20.0mL of the HCl(aq). Write a balanced chemical equation for this reaction and determine the
  100. Chemistry

    A 5.00-mL sample of an H3 PO4 solution of unknown concentration is titrated with a 0.1003 M NaOH solution. A volume of 6.55 mL of the NaOH solution was required to reach the endpoint. What is the concentration of the unknown H3 PO4 solution?