Question

The following reaction occurs in aqueous solution:

NH₄⁺ (aq) + NO₂⁻ → N₂ (g) + 2H₂O (l)

The data below is obtained at 25 °C.
[NH₄⁺](M) [NO₂⁻](M) IR(M/s)
0.0100 0.200 3.2x10⁻³
0.0200 0.200 6.4x10⁻³
The order of the reaction in NH₄⁺ is ________
A) -1
B) -2
C) 2
D) 0
E) 1

Answer 1

The order of the reaction in NH₄⁺ is 0.

Step-by-step explanation:

The order of the reaction in NH₄⁺ is D) 0.

The order of a reaction is determined by examining the rate law equation, which relates the rate of the reaction to the concentrations of the reactants. In this case, the rate law equation is not provided, but we can determine the order of the reaction in NH₄⁺ by analyzing the given data.

Looking at the given data, we can see that when the concentration of NH₄⁺ is doubled (from 0.0100 M to 0.0200 M), the rate of the reaction also doubles (from 3.2x10⁻³ M/s to 6.4x10⁻³ M/s). This indicates that the reaction rate is not dependent on the concentration of NH₄⁺, meaning its order is 0.