Question

For the reaction of hydrochloric acid and sodium thiosulfate, the rate law is written as:______
A. Rate = k [HCl]m [Na2S2O3]n
B. Rate = k [HCl + Na2S2O3]
C. Rate = t [HCl]a [Na2S2O3]x
D. Rate = t [HCl + Na2S2O3]

Answer 1

Answer:

A. $Rate =k[HCl]^{m} [Na_2S_2O_3]^{n}$

Explanation:

Let's consider the reaction between hydrochloric acid and sodium thiosulfate.

2 HCl + Na₂S₂O₃ → H₂O + S + SO₂ + 2 NaCl

The rate law is:

$Rate =k[HCl]^{m} [Na_2S_2O_3]^{n}$

where,

• Rate is the reaction rate

• k is the rate constant

• m and n are the reaction orders, which can only be determined experimentally and may or not coincide with the stoichiometric coefficients.