Dilute solution of ammonium hydroxide is added to aqueous solution of ferrous sulphate and ferrous hydroxide is formed. What type of reaction is this? Write chemical equation.[2 MARKS]

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Solution

Each point: 1 Mark

1. It is a double displacement reaction as exchange of ions is taking place between the reactants.

2. The equation is- ${FeSO}_{4} (aq) + 2 {NH}_{4} OH (aq) \to {Fe(OH)}_{2} (s) + {(NH}_{4})_{2} {SO}_{4} (aq)$

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State your observation with chemical equation :

Aqueous solution of ferrous sulphate is treated with sodium hydroxide

Q. What will be the colour of the precipitate formed when ferrous sulphate is added to an aqueous solution of sodium hydroxide?

[1 mark]

Q. When sodium hydroxide solution is added to a freshly prepared solution of ferrous sulphate, a green precipitate of ferrous hydroxide is formed which on standing turns brown because:

Q. (a) Explain, with example, how the physical states of the reactants and products can be shown in a chemical equation.
(b) Balance the following equation and add state symbols:

Zn + HCl \underset{}{\to} {ZnCl}_{2} + H_{2}

(c) Convey the following information in the form of a balanced chemical equation:
"An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution."

(a) Explain, with example, how the physical states of the reactants and products can be shown in a chemical equation.

(b) Balance the following equation and add state symbols :

$Z n + H C l ⟶ Z n C l_{2} + H_{2}$

"An aqueous solution of ferrous sulphate reacts with ans aqueous solution of sodium hydroxide to form aPrecipitate of ferrous hydroxide and sodium sulphate remains in solution."

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Dilute solution of ammonium hydroxide is added to aqueous solution of ferrous sulphate and ferrous hydroxide is formed. What type of reaction is this? Write chemical equation.[2 MARKS]

Each point: 1 Mark 1. It is a double displacement reaction as exchange of ions is taking place between the reactants. 2. The equation is- FeSO4(aq)+2NH4OH (aq)→Fe(OH)2(s)+(NH4)2SO4(aq)

Each point: 1 Mark

1. It is a double displacement reaction as exchange of ions is taking place between the reactants.

2. The equation is- ${FeSO}_{4} (aq) + 2 {NH}_{4} OH (aq) \to {Fe(OH)}_{2} (s) + {(NH}_{4})_{2} {SO}_{4} (aq)$