Purchase Solution

Calculating the pH in a flask at points in the titration.

Not what you're looking for?

100.0 ml of 0.100 M acetic acid is placed in a flask and is titrated with 0.100 M sodium hydroxide .

An appropriate indicator is used.

Ka for acetic acid is 1.7 x 10 -5

a. when no NaOH has been added.
b. after 25.0 ml of NaOH is added
c. after 50.0 ml of NaOH is added
d. after 75.0 ml of NaOH is added
e. after 100.0 ml of NaOH is added
f. what would be the appropriate indicator that was used ? consult fig 16.7 in BLB and explain your choice.

g. What would the pH be after 300 ml of 0.100 M NaOH was added.

Solution Summary

This solution explains how to calculate the pH level in a flask for the given chemistry problems.

Solution Preview

** Please see the attached file for the complete solution response **

Thank you.

Calculate the pH in a flask at points in the titration.
100.0 ml of 0.100 M acetic acid is placed in a flask and is titrated with 0.100 M sodium hydroxide. An appropriate indicator is used. Ka for acetic acid is 1.7 x 10 -5.

a. when no NaOH has been added.

CH3COOH ↔ CH3COO- + H+
Initial concentration 0.1 ----------- -----
Change -x +x +x
Equilibrium concentration 0.1 - x x x

Ka = [CH_3COO^-] [H^+] / [CH_3COOH]
1.7 x 10^-5 = (x)(x) / (0.1 - x)
Assume x as negligible:
1.7 x 10^-5 = x^2 / 0.1
x = 1.304 x 10^-3 = [H^+]

pH = - log [H^+]
pH = - log 1.304 x 10^-3
pH = 2.885

b. after 25.0 ml of NaOH is added

CH_3COOH + OH^- ↔ CH_3COO^- + H_2 ...

Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.