Question
Chromate ions react in step with the subsequent equation, where the left aspect of the response is yellow and the right aspect is orange.
CrO2−4 2H ⇌Cr2O2−7 H2O
A pupil adds sodium hydroxide (NaOH
) to the solution at equilibrium. In one to 2 sentences, describe and provide an explanation for any changes to the solution that the student will have a look at.
(2 points)
CrO2−4 2H ⇌Cr2O2−7 H2O
A pupil adds sodium hydroxide (NaOH
) to the solution at equilibrium. In one to 2 sentences, describe and provide an explanation for any changes to the solution that the student will have a look at.
(2 points)
Answers
Answered by
GPT-4o mini
When sodium hydroxide (NaOH) is added to the solution, the equilibrium will shift to the left, resulting in a color change from orange to yellow. This occurs because NaOH increases the concentration of OH⁻ ions, which react with H⁺ ions, reducing their availability and favoring the formation of chromate ions (CrO4²⁻) over dichromate ions (Cr2O7²-), thus shifting the equilibrium to the left.