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Question

Which hydroxide will have lowest value of solubility product at normal temperature (25oC)?
  1. Mg(OH)2
  2. Ca(OH)2
  3. Ba(OH)2
  4. Be(OH)2

A
Mg(OH)2
B
Ca(OH)2
C
Be(OH)2
D
Ba(OH)2
Solution
Verified by Toppr

As we move down the group of alkaline earth metals lattice enthalpy decreases much faster than hydration enthalpy so solubility of hydroxides increases down the group. So Be(OH)2 is least soluble and lowest value of solubility product.

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Q1
Which hydroxide will have lowest value of solubility product at normal temperature (25oC)?
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Q2

Which is more soluble Mg(oh)2 or. Ba(oh)2

While comparing solubility do we compare Ksp(solubility product values) or solubility (s) value

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The solubility product of Mg(OH)2 is 5×1019 at 25oC, pH of saturated solution of Mg(OH)2 will be:
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Which of the following sequence(s) is/are correct for solubility in H2O?
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(4) Li2CO3<Na2CO3<K2CO3<Rb2CO3
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