Question

What causes the pH to drop and turn the neutral red dye red in color? A) Increase in hydrogen ion (H+) concentration

B) Decrease in hydrogen ion (H+) concentration
C) Introduction of alkaline substances
D) Exposure to light

Answer 1

The pH of a solution drops and turns the neutral red dye red in color when there is an increase in hydrogen ion (H+) concentration.

Step-by-step explanation:

The pH of a solution drops and turns the neutral red dye red in color when there is an increase in hydrogen ion (H+) concentration. The neutral red dye is an acid-base indicator that changes color based on the concentration of hydronium ions (H3O+). In more acidic solutions, with higher H+ concentration, the dye appears red.