Question

Molecules on an acid–base indicator react chemically with ions in a solution, causing the indicator to change color. which ions in the solution cause this reaction? oxygen ions water ions hydrogen ions nitrogen ions

Answer 1

hydrogen ions
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Answer 2

Answer: The correct answer is hydrogen ions.

Step-by-step explanation:

Acid-base indicator is used to detect the pH of the solution.

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution.

• If the solution has high hydrogen ion concentration, then the pH will be low and the solution will be acidic. The pH range of acidic solution is 0 to 6.9
• If the solution has low hydrogen ion concentration, then the pH will be high and the solution will be basic. The pH range of basic solution is 7.1 to 14
• The solution having pH equal to 7 is termed as neutral solution.

The equation representing the reaction between hydrogen ions and acid-base indicator follows:

`H^++In^-\rightarrow H-In`

Hence, the correct answer is hydrogen ions.