Concept explainers
Indicate which compound in each of the following pairs is more likely to form ion pairs in water: (a) NaCl or Na2SO4, (b) MgCl2 or MgSO4 (c) LiBr or KBr.
(a)
Interpretation:
In the given pairs of compound, which are more likely to form ion pairs in water has to be indicated.
Concept introduction:
A couple of oppositely charged ions are connected together by Coulomb attraction without formation of covalent bond known as ‘ion pair’.
Coulomb’s law: This law states that oppositely charges are attracts each other with a force proportional to the product of the charges and inversely proportional to the distance between the charges and likely charges repels each other.
Where,
K - Coulomb’s law constant
Answer to Problem 13.79QP
The pairs that forms ion pairs in water is
Explanation of Solution
To explain ion pair of
Sodium chloride is an ionic substance which is placed in water, molecules of water interact with the ions on the surface of Sodium and chloride ion. If
Coulombs equation for
Distance between Sodium and chloride ion is 0.281nm which is smaller than the distance between Sodium and sulphate ion. According to Coulombs law, distance between the ions is smaller means the force of attraction is high. Hence the attraction of Sodium chloride and water is larger. So it forms ion pair mostly than Sodium sulphate.
(b)
Interpretation:
In the given pairs of compound, which are more likely to form ion pairs in water has to be indicated.
Concept introduction:
A couple of oppositely charged ions are connected together by Coulomb attraction without formation of covalent bond known as ‘ion pair’.
Coulomb’s law: This law states that oppositely charges are attracts each other with a force proportional to the product of the charges and inversely proportional to the distance between the charges and likely charges repels each other.
Where,
K - Coulomb’s law constant
Answer to Problem 13.79QP
The pairs that forms ion pairs in water is
Explanation of Solution
To explain ion pair of
Magnesium chloride soluble in water while placed in water; molecules of water interact with the ions on the surface of Magnesium and chloride ion. If
Coulombs equation for
Distance between Magnesium and chloride ion is 0.281nm which is smaller than the distance between Magnesium and sulphate ion. According to Coulombs law, distance is smaller means the force of attraction is high. Hence the attraction of Sodium chloride and water is larger. So it forms ion pair mostly than Magnesium sulphate.
(c)
Interpretation:
In the given pairs of compound, which are more likely to form ion pairs in water has to be indicated.
Concept introduction:
A couple of oppositely charged ions are connected together by Coulomb attraction without formation of covalent bond known as ‘ion pair’.
Coulomb’s law: This law states that oppositely charges are attracts each other with a force proportional to the product of the charges and inversely proportional to the distance between the charges and likely charges repels each other.
Where,
K - Coulomb’s law constant
Answer to Problem 13.79QP
The pairs that forms ion pairs in water is
Explanation of Solution
To explain ion pair of
Potassium bromide is water soluble, when the molecules of water interact with the ions on the surface of Potassium and bromide ion. If
Coulombs equation for
Distance between Magnesium and chloride ion is 0.281nm which is smaller than the distance between Magnesium and sulphate ion. According to Coulombs law, distance is smaller means the force of attraction is high. Hence the attraction of Sodium chloride and water is larger. So it forms ion pair mostly than Magnesium sulphate.
The compounds that are more likely to form ion pairs in water have been indicated.
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Chapter 13 Solutions
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