Which of the following ions has the largest heat of hydration?
Correct answer: B. Al3+
- A. Na+
- B. Al3+
- C. F-
- D. Sr2+
Explanation
Heat of hydration is directly proportional to the charge of the cation and inversely proportional to the size of the cation. Among given options Al has maximum charge of 3+ so it is supposed to have highest heat of hydration also it has small size combinely charge to size ratio increases that results in increase of heat of hydration.
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