What is the primary purpose of testing distilled water without an antacid during a distillation experiment?

• A. To determine the boiling point of the antacid
• B. To measure the pH change caused by the antacid
• C. To check for the presence of impurities or dissolved ions in the distilled water
• D. To observe the reaction between distilled water and antacid

Answer: (C)

Verified step by step guidance

1. Understand that distilled water is expected to be pure, containing no dissolved ions or impurities.
2. Recognize that testing distilled water without an antacid serves as a control experiment to establish a baseline measurement.
3. By testing the distilled water alone, you can check for any unexpected impurities or dissolved ions that might affect the results of the distillation experiment.
4. This step ensures that any changes observed when the antacid is added are due to the antacid itself, not contaminants in the water.
5. Therefore, the primary purpose is to verify the purity of the distilled water before introducing the antacid.