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FCAT Grade 8 Science Assessment Practice Questions

Category - FCAT Science Assessment Grade 8

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Which of the following can be used to determine the pH of a solution?
I. Methyl orange indicator
II. Litmus paper
III. pH probe
  1. I only.
  2. II only.
  3. I and II.
  4. I, II, and III.
  5. III only.
Explanation
Answer: D - Both litmus paper and a pH probe can be used to determine the pH of a solution. Litmus paper contains a mixture of dyes that react to changes in pH. Methyl orange is another pH indicator that is used in titrations to determine the content of acid in a solution.
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