Concept explainers
3.63 How many moles of solute are present in each of these
solutions?
(a) 48.0 mL of 3.4 M H2SO4.
(b) 1.43 mL of 5.8 M KNO3.
(c) 321 L of 0.034M NH3
(d) 1.9 × 10-3 L of 1.4 × 10-5 M NaF
(a)
To determine:
The number of moles of solute for 48.0 mL of 3.4 M
Explanation:
Molarity is defined as the number of moles of solute (
The solution is 3.4 M, i.e. it contains 3.4 moles of
per 1000 mL solution. Thus, for 48.0 mL solution, the number of moles would be:
Explanation of Solution
Molarity is defined as the number of moles of solute (
The solution is 3.4 M, i.e. it contains 3.4 moles of
per 1000 mL solution. Thus, for 48.0 mL solution, the number of moles would be:
Therefore, knowing the molarity of a given solution, the number of moles can be calculated for any given volume by simple calculations.
(b)
To determine:
The number of moles of solute for 1.43 mL of 5.8 M
Explanation:
Molarity is defined as the number of moles of solute (
The solution is 5.8 M, i.e. it contains 5.8 moles of
per 1000 mL solution. Thus, for 1.43 mL solution, the number of moles would be:
Explanation of Solution
Molarity is defined as the number of moles of solute (
The solution is 5.8 M, i.e. it contains 5.8 moles of
per 1000 mL solution. Thus, for 1.43 mL solution, the number of moles would be:
Therefore, knowing the molarity of a given solution, the number of moles can be calculated for any given volume by simple calculations.
(c)
To determine:
The number of moles of solute for 3.21 L of 0.034 M
Explanation:
Molarity is defined as the number of moles of solute (
The solution is 0.034 M, i.e. it contains 0.034 moles of
per 1000 mL solution. Thus, for 3.21 L solution, the number of moles would be:
Explanation of Solution
Molarity is defined as the number of moles of solute (
The solution is 0.034 M, i.e. it contains 0.034 moles of
per 1000 mL solution. Thus, for 3.21 L solution, the number of moles would be:
Therefore, knowing the molarity of a given solution, the number of moles can be calculated for any given volume by simple calculations.
(d)
To determine:
The number of moles of solute for
Explanation:
Molarity is defined as the number of moles of solute (
The solution is
solution, the number of moles would be:
Explanation of Solution
Molarity is defined as the number of moles of solute (
The solution is
solution, the number of moles would be:
Therefore, knowing the molarity of a given solution, the number of moles can be calculated for any given volume by simple calculations.
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Chapter 3 Solutions
CHEM FOR ENG >I<>CUSTOM<
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