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In the precipitation of the iron group i...

In the precipitation of the iron group in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to

A

decrease concentration of `OH^(-)` ions

B

prevent interference by phosphate ions

C

increase concentration of `Cl^(-)` ions

D

increase concentration of `NH_(4)^(+)` ions

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The correct Answer is:
A
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