If a solution is made by adding 0.250 grams of NaOH in enough H2O to make 10.0 mL of solution, what's the molarity of the solution?

Answered: If a solution is made by adding 0.250…

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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Question

If a solution is made by adding 0.250 grams of NaOH in enough H₂O to make 10.0 mL of solution, what's the molarity of the solution?

Expert Solution

Introduction:

The major factor involved in changing molarity (solution's concentration) is the temperature. Since, this concentration depends on volume which in turn is dependent on the temperature (Gay-Lussac law).

Given:

The mass of NaOH is 0.250 g.

The volume of solution is 10.0 mL.

Solution:

The formula to calculate molarity is shown below.

Moles of NaOH:

The formula to calculate moles is shown below.

The molar mass of NaOH is 40.0 g/mol.

Substitute the known values in equation (II) to calculate moles of NaOH.

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