Question

Use the reaction to answer the question.

Cr₂O72 (aq) + H₂0 (1) 2CrO4² (aq) + 2H*(aq)
Given Cr₂O72-ions are orange and CrO42- ions are yellow, which change to the reaction would most effectively make the
solution more orange?
(1 point)
O adding water
O increasing the pH
O removing water
O decreasing the pH

Answer 1

To make the solution more orange, increasing the pH of the solution is the most effective change to the reaction.

Step-by-step explanation:

In the given reaction, the Cr2O7^2- ions are orange and the CrO4^2- ions are yellow. To make the solution more orange, we need to increase the concentration of Cr2O7^2- ions. This can be achieved by increasing the pH of the solution. When the pH is increased, more H+ ions will be present in the solution, which will react with the CrO4^2- ions to form more Cr2O7^2- ions, resulting in a more orange solution.

Learn more about The effect of pH on the color change in a chemical reaction