General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

Published by Pearson
ISBN 10: 0321967461
ISBN 13: 978-0-32196-746-6

Chapter 9 - Solutions - Additional Questions and Problems - Page 367: 9.118

Answer

a. $0.900$ M $HCl$ solution. b. 6.00 % (m/v) $NH_4Cl$ solution. c. 0.510 M $KOH$ solution.

Work Step by Step

1. Write the dilution expression, and solve for the final concentration $(C_2)$ $C_1V_1 = C_2V_2$ $$\frac{C_1V_1}{V_2} = C_2$$ a. 2. Substitute the values and calculate the final concentration: $$C_2 = \frac{(25.0 \space mL)(18.0 \space M)}{500. \space mL}$$ $$C_2 = 0.900 \space M$$ b. 2. Substitute the values and calculate the final concentration: $$C_2 = \frac{(50.0 \space mL)(15.0 \space \% (m/v))}{125 \space mL}$$ $$C_2 = 6.00 \space \% (m/v)$$ c. 2. Substitute the values and calculate the final concentration: $$C_2 = \frac{(4.50 \space mL)(8.50 \space M)}{75.0 \space mL}$$ $$C_2 = 0.510 \space M$$
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