
Concept explainers
(a)
Interpretation:
The solution with the greatest concentration out of 100 mL of given solutions needs to be determined.
Concept introduction:
The molecular mass of a compound is the sum of
(a)

Answer to Problem C15.4RE
Since the volume is the same for all the given solutions, therefore, the NaOH and KCl will have a higher concentration.
Explanation of Solution
The concentration mainly depends on the number of moles and volume. Since the volume is the same for all the given solutions, therefore, the NaOH and KCl will have a higher concentration than the PbCl2 solution which is only 0.5 M compared to 1.0 M NaOH and KCl.
(b)
Interpretation:
The solution with greatest mass out of 100 mL of given solutions needs to be determined.
Concept introduction:
The molecular mass of a compound is the sum of atomic mass of all the atoms present in the given chemical compound. Mole concept is used to calculate the moles, mass, number of atoms and moles of a compound. The relation between these values can be shown as:
(b)

Answer to Problem C15.4RE
Explanation of Solution
Molar mass of NaOH = 39.9 g/mol
Molar mass of KCl = 74.5 g/mol
Molar mass of PbCl2 = 278 g/mol
Concentration = 1.0 M
Volume = 100 mL = 0.1 L
Calculate mass of each:
(c)
Interpretation:
The solution with maximum number of moles needs to be determined if volume is 100 mL for each; 0.1 M NaOH, 1.0 M KCl and 0.5 M pbCl2 solution.
Concept introduction:
The molecular mass of a compound is the sum of atomic mass of all the atoms present in the given chemical compound. Mole concept is used to calculate the moles, mass, number of atoms and moles of a compound. The relation between these values can be shown as:
(c)

Answer to Problem C15.4RE
NaOH and KCl will have most of the moles.
Explanation of Solution
Molar mass of NaOH = 39.9 g/mol
Molar mass of KCl = 74.5 g/mol
Molar mass of PbCl2 = 278 g/mol
Concentration = 1.0 M
Volume = 100 mL = 0.1 L
Calculate moles of each:
(d)
Interpretation:
The solution with maximum number of moles of ions needs to be determined if volume is 100 mL for each; 0.1 M NaOH, 1.0 M KCl and 0.5 M pbCl2 solution.
Concept introduction:
The molecular mass of a compound is the sum of atomic mass of all the atoms present in the given chemical compound. Mole concept is used to calculate the moles, mass, number of atoms and moles of a compound. The relation between these values can be shown as:
(d)

Answer to Problem C15.4RE
PbCl2will have most of the moles of ions.
Explanation of Solution
Molar mass of NaOH = 39.9 g/mol
Molar mass of KCl = 74.5 g/mol
Molar mass of PbCl2 = 278 g/mol
Concentration = 1.0 M
Volume = 100 mL = 0.1 L
Calculate mass of each:
Chapter U4 Solutions
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