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Precipitation Reaction

For a general...

Question

For a general chemical change
$1 A + 3 B \to$ products,
the rate of disappearance of A is $r_{1}$ and of B is $r_{2}$ . The rate $r_{1}$ and $r_{2}$ are related as :-

A

3 r_{1} = r_{2}

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B

r_{1} = r_{2}

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C

r_{1} = 3 r_{2}

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D

r_{1} = r_{2}^{3}

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Solution

The correct option is A $3 r_{1} = r_{2}$
$\frac{- d [A]}{d t} = + \frac{1}{3} \frac{d [B]}{d t} r_{1} = \frac{1}{3} r_{2} 3 r_{1} = r_{2}$

So answer is A.

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