Tetraammine Copper (II) Sulphate

State one relevant reason for the following: Hydrated copper sulphate crystals turn white on heating.

A molecule of hydrated copper sulphate crystals has five molecules of water of crystallization in it that maintains its crystal structure and gives it a blue colour. Upon heating these molecules evaporates leaving a white powder of copper sulphate behind.

State one relevant observation for the following reactions: Addition of excess ammonium hydroxide into copper sulphate solution.

When ammonium hydroxide is poured into the solution of blue coloured copper sulphate solution a blue coloured precipitate is formed. This precipitate is copper hydroxide that is insoluble in water. Ammonium sulphate is formed along with this. 2 NH 4 OH + CuSO 4 aq → Cu OH 2 s ↓ blue + NH 4 2 SO 4 When ammonium hydroxide is poured in excess it forms a complex deep blue solution of Cupra ammonium sulphate. 2 NH 4 OH + Cu OH 2 s blue + NH 4 2 SO 4 → Cu NH 3 4 SO 4 aq intense blue + 4 H 2 O

MEDIUM

Earn 100

Describe acidic salt with an example.

Important Questions on Acids, Bases and Salts

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

A light greenish salt is soluble in water. On passing

H_{2} S

gas into the solution, a black precipitate is obtained which dissolves readily in

HCI

. The metal ion present is

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

If excess of

{CO}_{2}

is passed through the suspension of a compound ‘X’ in water, a compound ‘Y’ is formed. Substances ‘X’ and ‘Y’ dissolve in

H_{2} {SO}_{4}

giving white compound ‘Z’ which is insoluble in water. Identify the compounds ‘X’, ‘Y’ and ‘Z’.

EASY

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

Complex salt is

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

Answer the following:

Write the formula of a salt that contains water of crystsllisation.

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

Aluminium oxide is called amphoteric oxide. Give reason.

HARD

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

State one relevant reason for the following:

Hydrated copper sulphate crystals turn white on heating.

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

What do you mean by the family of salts?

HARD

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

State one relevant observation for the following reactions:

Addition of excess ammonium hydroxide into copper sulphate solution.

HARD

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

The metal salt

A

is blue in colour. When salt A is heated strongly over a burner, then a substance

B

is eliminated and a white powder

C

is left behind. When a few drops of a liquid

D

are added to powder

C

, it becomes blue again. What could be

A, B, C

and

D

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

How would you show that blue copper sulphate crystals contain water of crystallisation?

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

Write the name and formula of one salt which contains ten molecules of water of crystallisation.

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.

EASY

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

Why are some salts called hydrated salts?

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

Write the name and formula of one salt which contains five molecules of water of crystallisation.

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

The blue colour of crystals of a substance changed to white on heating in a closed test tube but the colour was regained after sometime on cooling. Name the substance and write its chemical formula. Explain the phenomenon involved.

HARD

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

What are neutral salts, acidic salts and basic salt. Give two examples each of neutral, acidic and basic salts.

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

The elements present in baking soda are_____.

MEDIUM

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

What is meant by 'hydrated' and 'anhydrous' salts? Explain with examples.

EASY

Science>Chemistry>Acids, Bases and Salts>Salts and Its Types

What is meant by "water of crystallisation" in a substance? Explain with an example