Chemistry & Chemical Reactivity
10th Edition
ISBN: 9781337399074
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Textbook Question
Chapter 4.8, Problem 4.10CYU
A 25.0-mL sample of vinegar (which contains the weak acid acetic acid, CH3CO2H) requires 28.33 mL of a 0.953 M solution of NaOH for titration to the equivalence point. What is the mass of acetic acid (molar mass = 60.05 g/mol), in grams, in the vinegar sample, and what is the concentration of acetic acid in the vinegar?
CH3CO2H(aq) + NaOH(aq) → NaCH3CO2(aq) + H2O(l)
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Consider the titration of acetic acid (CH3COOH) with sodium hydroxide to form sodium acetate (NaCH3COO) and water. A 10.0 mL sample of acetic acid requires 37.55 mL of 0.233 M NaOH to reach the equivalence point. What is the concentration of the acetic acid?
4. The concentration of a NaOH solution is determine by using the solution to titrate a
sample of potassium hydrogen phthalate (C8H5O4K, M = 204.22 g/mol). In the titration
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equivalence point.
a) Calculate the concentration of the sodium hydroxide solution.
Potassium hydrogen Phthalate = 0-10829, Molar mass of KMP=204-22
Hales of KMP = Mass
0.10829
g/mol
Mm
6.000529 mal
204229/Mal
Concentration of NaOH = Males
=
=
of
volume of Naot (L)
= 0-000529 mal
34-67 mе
onl ها
NaOH (mal)
= 0.000015258 mal/L
0.015M
b) This solution of sodium hydroxide is used for another titration. A sample of 10.0 mL
of HCI is neutralized using 22.1 mL of sodium hydroxide solution. Calculate the
concentration of the HCI solution.
sodium hydroxide 222.1 ml,
Nal100
A chemistry graduate student is given 250. mL of a 1.50M hydrocyanic acid
(HCN) solution. Hydrocyanic acid is a weak acid with K,=4.9 × 10 1º. What
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into a buffer with pH = 8.84?
You may assume that the volume of the solution doesn't change when
the NaCN is dissolved in it. Be sure your answer has a unit symbol, and
round it to 2 significant digits.
?
Chapter 4 Solutions
Chemistry & Chemical Reactivity
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