For a chemical reaction:

A + B → Products

What is the overall order of chemical reaction?

1

A + B → Products

Rate of reaction = k [A]^x [B]^y

2.0 x 10^-3 = k [0.1]^x [0.1]^y   .....(i)

4.0 x 10^-3 = k [0.2]^x [0.2]^y   ......(ii)

2.0 x 10^-3 = k [0.1]^x [0.2]^y    ......(iii)

Divide (iii) By (i), we get

\(\frac{2.0 × 10^{-3}}{2.0 × 10^{-3}}\) = \(\frac{k[0.1]^x[0.2]^y}{k[0.1]^x[0.1]^y}\)

1 = 2y

2⁰ = 2^y

y = 1

Divide (ii) by (iii), we get

\(\frac{4.0 × 10^{-3}}{2.0 × 10^{-3}}\) = \(\frac{k[0.2]^x[0.2]^y}{k[0.1]^x[0.2]^y}\)

2 = 2^x

2¹ = 2^x

 x = 1

Overall order = x + y = 1 + 0 = 1