Question

Yellow chromate ions (CrO4) react with hydrogen ions(2H) in acid to form orange dichromate ions (CrO7)... if more acid is added to an equilibrium mixture will it become more orange or more yellow?

help ASAP pleaseee

Answer 1

The solution will become more orange.

Step-by-step explanation:

Start by writing the chemical equation for the equilibrium.

`\underbrace{\hbox{2CrO$_(4)^(2-)$}}_{\hbox{yellow}} + \text{2H}^(+) \rightleftharpoons \underbrace{\hbox{Cr$_(2)$O$_(7)^(2-)$}}_{\hbox{orange}} + \text{H}_(2)\text{O}`

Le Châtelier’s Principle states that if you apply a stress to a system at equilibrium the system will respond in a way that will reduce the stress.

In this case, the stress is the addition of H⁺ ions.

The system will respond by trying to get rid of the added H⁺ ions.

Thus, the position of equilibrium will move to the right.

More Cr₂O₇²⁻ ions will form, and the solution will become more orange.