Concept explainers
(a)
Interpretation:
The concentration of potassium ions in the solution that is prepared has to be calculated.
Concept Introduction:
Molarity of the solution is defined as the number of moles of solute that is dissolved in the volume of solution in liters. Unit of molarity is
From the above equation, the mass of solute can be calculated if the concentration and volume is known.
(a)
Answer to Problem G.21E
The concentration of potassium ions is
Explanation of Solution
The solution is said to be prepared by dissolving
Number of moles of potassium from
Molar mass of
One mole of
Number of moles of potassium from
Molar mass of
One mole of
Number of moles of potassium from
Molar mass of
One mole of
Thus, the total potassium ions in the solution is calculated by summing up all the moles of potassium ions. This is done as follows;
The volume of the solution is given as
Thus, the concentration of potassium ions in
(b)
Interpretation:
The concentration of sulfide ions in the solution that is prepared has to be calculated.
Concept Introduction:
Refer part (a).
(b)
Answer to Problem G.21E
The concentration of sulfide ions is
Explanation of Solution
The solution is said to be prepared by dissolving
Among the three components, only sulfide ion is contributed by
Molar mass of
One mole of
The volume of the solution is given as
Thus, the concentration of sulfide ions in
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Chapter F Solutions
Chemical Principles: The Quest for Insight
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