Question

Write the balanced equation for the following chemical reactions.

(i) Hydrogen + Chlorine ➜ Hydrogen Chloride.

(ii) Barium chloride + Aluminium sulphate ➜ Barium sulphate + Aluminium chloride.

(iii) Sodium + Water ➜ Sodium hydroxide + Hydrogen.​

Answer 1

Explanation:

When Hydrogen gas reacts with chlorine gas then hydrochloric acid is formed.

Chemical equation :-

• H2 + Cl2 ➜ 2HCl

When Barium chloride reacts with Aluminum sulphate then Barium sulphate and Aluminium chloride is formed.

Chemical equation :-

• 3BaCl2 + Al2(SO4)3 ➜ 3BaSO4 + 2AlCl3

When Sodium reacts with water then Sodium hydroxide and hydrogen gas is produced.

Chemical equation :-

• 2Na + 2H2O ➜ 2NaOH + H2

Additional information :-

Types of chemical reaction :-

• Combination reaction -

Those reaction in which two or more substances combined to form a single substance, are called combination reaction.

• Decomposition reaction -

Those reaction in which a compound splits

up into two or more simpler substances are known as decomposition reaction.

• Displacement reaction -

Those reaction in which one element takes the place of another element in a compound, are known as Displacement reaction.

• Double Displacement reaction -

Those reaction in which two compounds react by an exchange of ions to form two new compounds are called double displacement reaction.

Answer 2

QUESTIONS:

1. Hydrogen + Chlorine → Hydrogen Chlorine
2. Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride
3. Sodium + Water → Sodium hydroxide + hydrogen

ANSWERS:

1) Sol:

H2 + Cl2 → HCl

Balancing the equation

H2 + Cl2 → 2HCl

Hence, H2 + Cl2 → HCl By ---» Balancing H2 + Cl2 → 2HCl

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2) Sol:

BaCl2 + Al2SO4 → BaSO4 + Al2Cl2

Balancing the equation

3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3

Hence, BaCl2 + Al2SO4 → BaSO4 + Al2Cl2 By ---»balancing 3BaSO4 + 2AlCl3

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3) Sol:

Na + H2O → Na(OH)2 + H2

Balancing the equation

2Na + 2H2O → 2Na(OH)2 + H2

Hence, Na + H2O → Na(OH)2 + H2 By ---» Balancing 2Na + 2H2O → 2Na(OH)2 + H2