
Interpretation:
The solution that would weigh the most needs to be identified from 1.0 L of 1.0 M NaBr, 500mL of 1.0 M KCl and 1.0 L of 0.5 M NaOH.
Concept Introduction:
Molarity is defined as the moles of solute in a liter volume of a solution.
The total mass of solution is the sum of the mass of solute and that of the solvent which is water for aqueous solutions

Answer to Problem 7E
1.0 L of 1.0 M NaBr would weigh the most
Explanation of Solution
Given:
Volume (V) of NaBr = 1.0 L
Molarity (M) of NaBr = 1.0M
Calculation:
Based on equation (1) and (2):
Molar mass of NaBr = 102.89 g/mol
Based on equation (4):
b)
Given:
Volume of KCl= 500 ml
Molarity of KCl= 1.0 M
Calculation:
Based on equation (1) and (2):
Molar mass of KCl = 74.55 g/mol
Based on equation (4):
c)
Given:
Volume of NaOH = 1.0 L
Molarity of NaOH = 0.5 M
Calculation:
Based on equation (1) and (2):
Molar mass of NaOH = 40 g/mol
Based on equation (4):
Therefore, based on the calculations, 1.0 L of 1.0 M NaBr would weigh the most
Chapter U4 Solutions
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