20.State a control variable if you're investigating the effect of pH on the time taken for iodine to remain yellow.
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Solution 1
A control variable in this experiment could be the temperature at which the experiment is conducted. This means that you would keep the temperature constant throughout the experiment to ensure that any changes in the time taken for iodine to remain yellow are due to the pH level, not changes in temp Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study prob
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20.State a control variable if you're investigating the effect of pH on the time taken for iodine to remain yellow.
16.State the independent variable if you're investigating the effect of pH on the time taken for iodine to remain yellow.
18.State a control variable if you're investigating the effect of temperature on the time taken for iodine to remain yellow.
17.State the dependent variable if you're investigating the effect of temperature on the time taken for iodine to remain yellow.