the reaction shifts left or toward the reactants when hcl is added. which substance(s) increase in…

the reaction shifts left or toward the reactants when hcl is added. which substance(s) increase in concentration during the shift? h₂(g) + cl₂(g) ⇌ 2hcl(g) + 184.6 j h₂ and cl₂ hcl

the reaction shifts left or toward the reactants when hcl is added. which substance(s) increase in concentration during the shift? h₂(g) + cl₂(g) ⇌ 2hcl(g) + 184.6 j h₂ and cl₂ hcl

Answer

Explanation:

Step1: Analyze Le Chatelier's Principle

When a stress (like adding a product) is applied to an equilibrium system, the system shifts to counteract the stress. Here, adding HCl (a product) shifts the reaction left (toward reactants).

Step2: Determine Concentration Changes

A left shift means reactants ($\ce{H2}$ and $\ce{Cl2}$) are formed from products ($\ce{HCl}$). So their concentrations increase, while $\ce{HCl}$ concentration decreases.

Answer:

$\ce{H2}$ and $\ce{Cl2}$