Concept explainers
Calculate the concentrations of all the species in a
Interpretation:
The concentration of all the species present in the sodium carbonate solution is to be calculated.
Concept introduction:
Salt is a strong electrolyte that dissociates completely when added to water.
When a salt contains an anion thatcomes from a weak acid, then the anion recombineswith water to produce a weak acid and hydroxide ions which ultimately forms a basic solution. Ifthe cation comes from a strong base,it does not recombine and is present in the solution as a free ion, without having any effect on the pH of the solution.
The reaction of the salt
Here,
The relationship between
Where,
Answer to Problem 150AP
Solution:
Explanation of Solution
Given information:
The concentration of the solution that contains sodium carbonate
All the species present in the salt solution are
The
But the anion
First step takes place as follows:
From table
Now, prepare an initial change equilibrium table and represent each of the species in terms of
Now, substitute these concentrations in equation (2) as follows:
Approximate the value
Substitute the value of
Thus,
Now,thesecond step proceeds as:
From table
Now, prepare an initial change equilibrium table and represent each of the species in terms of
Now, substitute these concentrations in equation (2) as follows:
Approximate the value
Substitute the value of
Thus,
The concentration of sodium and carbonate ions is as follows:
The concentration of
The concentration of hydroxide and hydrogen ions is as follows:
The concentration of all the given species present in the salt solution as follows:
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Chapter 16 Solutions
Package: Chemistry With Aleks 360 Access Card, 2-semester
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