I can identify the extent to which a compound will be soluble in water khan academy

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o