Question

0.01 M HCl solution has a pH of 2. Suppose that during the experiment, both the universal pH indicator and the cabbage indicator turn orange-red for 0.01 M HCl. What can you conclude about the the cabbage indicator key?

A) It matches the universal pH indicator and is indicating the proper pH.
B) It should completely match the universal indicator key for all pH values greater than 7 (base).
C) It should completely match the universal indicator key for all pH values.
D) There was some sort of experimental error, because the indicators should never match.

Answer 1

Answer:

(A) It matches the universal pH indicator and is indicating the proper pH.

Explanation:

Correct on edge 2021

Answer 2

Given the data from the question, the correct statement is:

• The cabbage indicator matches the universal pH indicator and is indicating the proper pH (Option A)

What is pH ?

This is simply a measure of the acidity / alkalinity of a solution.

The pH measures the hydrogen ion concentration while the pOH measures the hydroxide ion concentration

pH scale

The pH scale is a scale that gives an understanding of the variation of the acidity / alkalinity of a solution.

The scale ranges from 0 to 14 indicating:

• 0 to 6 indicates acid
• 7 indicates neutral
• 8 to 14 indicate basic

pH indicators

These are devices / equipment used to indicate if a solution is acidic, neutral or basic.

From the question given above, we were told that the universal and the cabbage pH indicator gives the same result.

Therefore, we can conclude that the cabbage indicator is indicating the proper pH (Option A)

Learn more about pH:

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