
Concept explainers
If 9 g of NaC1 were dissolved in 1 L of water, what would be concentration, in atoms per milliliter, of each of the constituent elements in the solution?

The concentration in atoms per millilitre of each of the constituent elements in the solution.
Answer to Problem 3.23P
Concentrations:
Number of atoms of Na added to the solution in 9 gm =
Number of atoms of Cl added to the solution in 9 gm =
Number of atoms of H in 1 millilitre of water =
Number of atoms of O in 1 millilitre of water =
Explanation of Solution
Given Information:
9 g of NaCl were dissolved in 1 L of water
Calculation:
Na = 22.99 g/mole
Cl = 35.45 g/mole
NaCl = 58.43 g/mole
Calculating the number of atoms of Na added to the solution in 9 gm,
Calculating the number of atoms of Cl added to the solution in 9 gm,
=
H = 1 g/mole
O = 16 g/mole
H2O = 2(1 g/mole) + 16 g/mole = 18 g/mole
Calculating the number of atoms of H in 1 millilitre of water (assume 1 litter = 1000 g water),
Calculating the number of atoms of O in 1 millilitre of water (assume 1 litter = 1000 g water),
Conclusion:
The concentration, in atoms per millilitre, of each of the constituent elements in the solution is as follows.
Number of atoms of Na added to the solution in 9 gm =
Number of atoms of Cl added to the solution in 9 gm =
Number of atoms of H in 1 millilitre of water =
Number of atoms of O in 1 millilitre of water =
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