Students are measuring the pH of different substances. Their hypothesis is that cola will be the most acidic material that is tested. The following procedure is used:
1. Place 100 milliliters (ml) of cola, lemon juice, liquid soap, and milk in individual 500 ml beakers.
2. Test the pH of the material at room temperature.
3. Record the data
Which change to the procedure would make the results more accurate?
-test each material multiple times
-increase the amount of each sample
-complete the trials at different times
-conduct the trials at different temperatures
Answers: 1
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