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Question: The concentration of a reactant decreases from 0.2 M to 0.1 M in 10 minutes. The rate of the reactio...

The concentration of a reactant decreases from 0.2 M to 0.1 M in 10 minutes. The rate of the reaction is.

A

0.01 M

B

10−210^{- 2}

C

0.01 mol dm−3min⁡−1dm^{- 3}\min^{- 1}{}

D

1 mol dm−3min⁡−1dm^{- 3}\min^{- 1}{}

Answer

0.01 mol dm−3min⁡−1dm^{- 3}\min^{- 1}{}

Explanation

Solution

Rate of reaction = dxdt=[0.2−0.110]=0.110\frac{dx}{dt} = \left\lbrack \frac{0.2 - 0.1}{10} \right\rbrack = \frac{0.1}{10}

=0.01moldm−3min−1= 0.01moldm^{- 3}min^{- 1}.