To find:
The molarity of
a)
b)
c)
d)
Answer to Problem 8.13QA
Solution:
a) The molarity of
b) The molarity of
c) The molarity of
d) The molarity of
Explanation of Solution
1) Concept
To determine the concentration of ions present in the molecules, we need to use the moles of the compound and the mole ratio between them. We can calculate the moles from molarity and volume.
2) Formula
i)
ii)
3) Given
i)
ii)
iii)
iv)
4) Calculation
The molarity of
a)
Dissociation equation for
The mole ratio of
So
So,
Molarity of
b)
Dissociation of
The mole ratio of
Therefore, molarity of
c)
Dissociation of
Since the mole ratio of
So,
So,
d)
Dissociation equation for
The mole ratio of
Conclusion:
We calculated the molarity of Na+ from the molarity and moles ratios present in the compound and also from the mass and volume of the compounds.
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