Answered: Calculate the mass needed to prepare…

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

Calculate the mass needed to prepare 263.0 mL 0.50 M NaOH ?

Expert Solution

Step 1

Given data

Molarity of desired NaOH solution = 0.50 M

Volume of the desired solution , V = 263.0 mL

Standard definition and value

Molarity of solution is defined as the number of mole of solute per liter volume of solution.

$V = (263.0 m L) (\frac{1.0 L}{1000.0 m L}) = 0.263 L$

The molar mass of NaOH = 40.0 g/mole

Step 2

Calculate mole of NaOH required

$M o l a r i t y = \frac{m o l e o f N a O H}{V o l u m e o f s o l u t i o n i n L i t e r} 0.50 = \frac{m o l e o f N a O H}{0.263} m o l e o f N a O H = (0.50) (0.263) = 0.1315$

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