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Types of Elementary Reactions

The rate cons...

Question

The rate constant of a first order reaction is $3 \times 10^{- 6} s e c^{- 1}$ . If initial concentration is 0.10 M, find out the initial rate $(M s^{- 1})$ :

A

3 \times 10^{- 6}

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B

3 \times 10^{- 5}

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C

3 \times 10^{- 8}

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D

3 \times 10^{- 7}

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Solution

The correct option is B $3 \times 10^{- 7}$
As we know,

$R a t e = K \times [A] = 3 \times 10^{- 6} \times 0.1 = 3 \times 10^{- 7} M s^{- 1}$

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Similar questions

Q. The rate constant of a first-order reaction is

3 \times 10^{- 6} s e c^{- 1}

. If the initial concentration is

0.10 M

, the initial rate

(i n M s^{- 1})

Q. For the reaction

A + B \to C

; starting with different initial concentrations of A and B, the initial rate of reaction were determined graphically in four experiments. Find the rate of reaction (

r

S.No.	[A] M (Initial conc.)	[B] M (Initial conc.)	rate (M $s e c^{- 1}$ )
1	$1.6 \times 10^{- 3}$	$5 \times 10^{- 2}$	$10^{- 3}$
2	$3.2 \times 10^{- 3}$	$5 \times 10^{- 2}$	$4 \times 10^{- 3}$
3	$1.6 \times 10^{- 3}$	$10^{- 1}$	$2 \times 10^{- 3}$
4	$3.2 \times 10^{- 3}$	$10^{- 1}$	$8 \times 10^{- 3}$

Sr.No.	$[A]_{0} / M$ (lonic conc.)	$[B]_{0} / M$ (lonic conc.)	rate/ $(M s e c^{- 1})$
1	$1.6 \times 10^{- 3}$	$5 \times 10^{- 2}$	$10^{- 3}$
2	$3.2 \times 10^{- 3}$	$5 \times 10^{- 2}$	$4 \times 10^{- 3}$
3	$1.6 \times 10^{- 3}$	$10^{- 1}$	$2 \times 10^{- 3}$
4	$3.2 \times 10^{- 3}$	$10^{- 1}$	$8 \times 10^{- 3}$

For the reaction

A + B ⟶ C

; starting with different initial concentration of A and B, initial rate of reaction were determined graphically in four experiments :
Rate law for reaction from above data is :

Q. The rate of a reaction starting with initial concentration of

2 \times 10^{- 3} M

1 \times 10^{- 3} M

240 \times 10^{- 4} M s^{- 1}

0.60 \times 10^{4} M s e c^{- 1}

respectively. The rate constant is:

Q. Rate For the reaction

A + B \to p r o d u c t s

, what will be the order of reaction with respect of

A

B

Exp.	$[A] (m o l L^{- 1})$	$[B] (m o l L^{- 1})$	Initial rate $(m o l L^{- 1} s^{- 1})$
$1.$	$2.5 \times 10^{- 4}$	$3 \times 10^{- 5}$	$5 \times 10^{- 4}$
$2.$	$5 \times 10^{- 4}$	$6 \times 10^{- 5}$	$4 \times 10^{- 3}$
$3.$	$1 \times 10^{- 3}$	$6 \times 10^{- 5}$	$1.6 \times 10^{- 2}$

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