MyQuestionIcon

8

You visited us 8 times! Enjoying our articles? Unlock Full Access!

Bleaching Powder

Soap forms in...

Question

Soap forms insoluble precipitates with calcium and magnesium ions present in hard water. True or False?

A

True

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

False

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A
True

Calcium and magnesium ions present in hard water form insoluble precipitates with fatty acids present in the soap by replacing sodium ions present in the it. All the insoluble compounds that are formed after the reaction of soap with hard water is called soap scum.

Suggest Corrections

thumbs-up

1

Similar questions

Q. Assertion :Scum is formed when hard water is treated with soap. Reason: Hard water contains calcium and magnesium ions. When soap comes in contact with hard water, these ions form calcium and magnesium salts of fatty acids which are insoluble in water. These calcium or magnesium salts precipitate out in the form of scum.

Q. Assertion (A): Hard water forms sticky precipitate with soap.
Reason (R): Hard water contains calcium and magnesium ions

Q. Assertion (A): Hard water gives easy lather with soap.
Reason (R): Salts of calcium and magnesium react with soap to form insoluble salts.

Q. Soaps do not work with hard water containing calcium and magnesium ions because:

Q. When soap is added to hard water

N a^{+}

of soap is replaced by

C a^{2 +}

M g^{2 +}

ions and precipitates as

C a

M g

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Bleaching Powder - Tackle

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Bleaching Powder

Standard IX Chemistry

Join BYJU'S Learning Program

CrossIcon