Multiple choice

Which of the following cations is/are found in hard water?

  1. Ca and Na

  2. Mg and Na

  3. Ca and Mg

  4. Ca, Na and Mg

  5. Only Na

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, Ca and Mg cations are present in hard water. They react with soap to give insoluble salts.