Answered: A 50.0 mL solution of Ca(OH)₂ with an…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A 50.0 mL solution of Ca(OH)₂ with an unknown concentration was titrated with 0.340 M HNO₃. To reach the endpoint, a total of 20.2 mL of HNO₃ was required.

What was the concentration of the initial Ca(OH)2 solution?

Expert Solution

Step 1

Balanced chemical equation is

Ca(OH)₂ + 2HNO₃ $\rightarrow$ Ca(NO₃)₂ + 2H₂O

According to balanced reaction 1 mole Ca(OH)₂ react with 2 mole HNO₃ molar ratio between Ca(OH)₂ to HNO₃ is 1:2 therefore to react with 0.006834 moles HNO₃ required Ca(OH)₂ = 0.006834 / 2 = 0.003417 moles

moles of Ca(OH)₂ had present at initial = 0.003417 moles

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