Multiple choice

Soap molecules form __________ with hard water.

  1. lather

  2. scum

  3. precipitate

  4. both 1 and 2

  5. both 2 and 3

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

Yes, this is the correct option. With hard water soap solutions form a white precipitate and off white layer over water known as soap scum, instead of producing lather.