Cindy hypothesizes that if she adds salt to a weak acid, then its pH will be lowered. She develops the following experiment to test her hypothesis. Which of the following steps could compromise the validity of her experiment?

Fill two beakers with 50 mL of the same weak acid.
Add salt to the first beaker.
Add water to the second beaker.
Measure the pH of the solution in each beaker.

2 Answer


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