Chemistry
Assertion (A): Calcium salt solution does not show any change even after adding an excess of ammonia solution to it.
Reason (R): The low concentration of hydroxide ion in ammonium hydroxide solution which are unable to precipitate the hydroxide ions of calcium
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Analytical Chemistry
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Calcium salt will not show precipitation even with addition of excess of NH4OH. This is because the concentration of OH- ions from the ionization of NH4OH is so low that it cannot precipitate the hydroxide of calcium. Hence both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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