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Chapter 10: Q. 10.95 (page 360)

A 0,205 M NaOH solution is used to titrate 20.0mLof a solution of H2SO4. If 45.6ml, of the NaOHsolution is required to reach the endpoint, what is the molarity of the H2SO4solution? (0,7)

H2SO4(aq)+2NaOH(伪q)鉄�2H2OND+Na2SO4(伪q)

Short Answer

Expert verified

MolarityH2SO4=2脳0.00234moleH2SO40.02L

=0.234MH2SO4

Step by step solution

01

Given information

That are given numbers are calculated by : (1)

Metric Molarity Mole divide by

02

Explanation

Step 1 Given 45.6mlof0.205MNaOH;20.0mlH2SO4=0.02LH2SO4.

Need molarity of H2SO4

Step 2 Plan

Metric Molarity Mole divide by

45.6mlLmoles NaOHmolesH2SO4MH2SO4

Factor factor factor liters

Step 3 Equalities /conversion factors

1LNaOH=0.205moleNaOH1L0.205mole=0.205mole1L1LNaOH=1000mlNaOH1L1000ml=1000ml1L
03

Given information 

Equation are:

04

Explanation 

2 mole NaOH=l moleH2SO4

2moleNaOH1moleH2SO4 and ImoleH2SO42moleNaOH

Step 4 Set up problem

45.6mlSeOH脳1LNeOH1000mlNaOH脳0.205moleNeOH1LSaeOH脳lmoleH2SO42mole,SeOH=0.00234moleH2SO4MolarityH2SO4=2脳0.00234mole2SO40.02L=0.234MH2SO4

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Most popular questions from this chapter

Which of the following are not at equilibrium?

a. The rates of the forward and reverse reactions are equal.

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c. The concentrations of reactants and the products are not constant.

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If a base is added to pure water, why does the H3O+decrease?
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