Question

$\huge \underline {\underline{QᴜᴇSᴛɪᴏɴ}}$
Explain the formation of scum when hard water is treated with soap.​

Answer 1

Answer:

When soap is dissolved in hard water, it reacts with the calcium and magnesium ions that are present there and form calcium and magnesium salt of fatty acids. These salts are not miscible in water at all and form a white layer on the surface of the water called scum.

Answer 2

Answer:

When soap is dissolved in hard water, it reacts with the calcium and magnesium ions that are present there and form calcium and magnesium salt of fatty acids. These salts are not miscible in water at all and form a white layer on the surface of the water called scum