Question

A 34.00 mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1322...

A 34.00 mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1322 M KOH solution. A volume of 43.22 mL of KOH was required to reach the equivalence point.

What is the concentration of the unknown H2SO4H2SO4 solution?

Express your answer using four significant figures.

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Homework Answers

Answer #1

H2SO4 + 2KOH K2SO4 + 2H2O

Data:

VH2SO4 = 34 mL

MH2SO4 = ?

VKOH = 43.22 mL

MKOH = 0.1322 M

We transform the milliliters into liters for the calculation of the concentration

The formula for calculating the concentration is as follows:

The moles of the above formula are determined:

molKOH = 0.1322mol/L * 0.04322L = 0.005714 mol of KOH

0.005714 mol KOH * 1 mol H2SO4 / 2 mol KOH = 0.002857 mol of H2SO4

M = 0.002857 mol H2SO4 / 0.034 L = 0.08402 M of H2SO4

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