5. a. A student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M so- dium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH(aq), to a phenolphthalein end point. If the titration required 21.84 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide solution, NaOH(aq). (Remember that KHP is potassium hydrogen phthalate, KHC,H¸O, NOT potassium hydrogen phosphorus!) #ofmel NacH メ nelar cancentratica = #of L NaO4 =0.1310 nd loa 6M NoO4 = of mel NoCH 0.02184L haOM しvOM b. The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phenolphtha- lein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of acetic acid, HC,H,0,(aq), in the vinegar. HCZ M3 Oz 392 of NeOH G.01 L KP NaOM = Calculate the mass percent of acetic acid, HC,H,O,(aq), in the vinegar using the molar con- centration for acetic acid, HC,H 0,(aq), determined in part b and assuming the density of the solution is 1.01 g/mL. c.
5. a. A student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M so- dium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH(aq), to a phenolphthalein end point. If the titration required 21.84 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide solution, NaOH(aq). (Remember that KHP is potassium hydrogen phthalate, KHC,H¸O, NOT potassium hydrogen phosphorus!) #ofmel NacH メ nelar cancentratica = #of L NaO4 =0.1310 nd loa 6M NoO4 = of mel NoCH 0.02184L haOM しvOM b. The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phenolphtha- lein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of acetic acid, HC,H,0,(aq), in the vinegar. HCZ M3 Oz 392 of NeOH G.01 L KP NaOM = Calculate the mass percent of acetic acid, HC,H,O,(aq), in the vinegar using the molar con- centration for acetic acid, HC,H 0,(aq), determined in part b and assuming the density of the solution is 1.01 g/mL. c.
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter4: Chemical Reactions
Section: Chapter Questions
Problem 4.130QP: Arsenic acid, H3AsO4, is a poisonous acid that has been used in the treatment of wood to prevent...
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Transcribed Image Text:5. a.
A student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M so-
dium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide
solution, NaOH(aq), to a phenolphthalein end point. If the titration required 21.84 mL of
sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide
solution, NaOH(aq). (Remember that KHP is potassium hydrogen phthalate, KHC,H¸O,
NOT potassium hydrogen phosphorus!)
NoOH-
ndar concentrdica =
#of mel NaCH
メ
KHP
#of L NaO4
mと DaOH
6M NaO4 = # of mel NeOH
0.02184L NaOM
=0.1310 nl lon
ntranicn=?
of KHP
b. The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phenolphtha-
lein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH(aq), calculate
the molar concentration of acetic acid, HC,H 0,(aq), in the vinegar.
OML HCZ H3O2
MP
iem Lof NeOH
af NaoM =
0.01 L
0.2
Calculate the mass percent of acetic acid, HC,HO,(aq), in the vinegar using the molar con-
centration for acetic acid, HC,H,0,(aq), determined in part b and assuming the density of
the solution is 1.01 g/mL.
с.
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