Question

how does a phenol red-containing solution look if co2 level is low?

Answer 1

Answer:

The variables to be examined in relation to carbon dioxide use are the amount of light exposure and amount of dissolved CO2. Phenol red is yellow/orange under acidic conditions, that is when the pH of the solution is less than 7 (e.g. pH = 6). This occurs when the concentration of CO2 is high.

Explanation:

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Answer 2

A phenol red-containing solution with low CO2 level will appear red.

Phenol red is a substance that serves as an indicator. It changes in colouration in response to the acidity or alkalinity of solutions.

In acidic solutions, phenol red turns yellow while the colour is red in basic solution.

Solutions with high CO2 levels are acidic while those with little to no CO2 concentrations are basic.

Thus, in a low CO2 solution, phenol red will turn red and the solution will generally appear red.

More on acid/base indicators can be found here: https://brainly.com/question/16284171?referrer=searchResults