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Catalysis

Write the bal...

Question

Write the balanced chemical equations for the following chemical reactions-
(i) Aqueous solution of sulfuric acid and sodium hydroxide react to form aqueous sodium sulfate and water.
(ii) Phosphorous burns in chlorine gas to form phosphorous pentachloride.

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Solution

Balanced chemical equations:
The chemical equation is said to be balanced if the number of atoms for each element present in the reaction is the same on both sides of the reaction, the reactant side and the product side.
(i) Aqueous solution of sulfuric acid and sodium hydroxide react to form aqueous sodium sulfate and water.
The chemical equation is given as:
H₂SO₄(aq) + NaOH (aq) ⇢ Na₂SO₄ (aq)+ H₂O (l)
The equation is unbalanced as it contains an unequal number of atoms for Sodium (Na) and Hydrogen (H). Therefore, the balanced equation is given as:
H₂SO₄(aq) + 2NaOH (aq) ⇢ Na₂SO₄ (aq)+ 2H₂O (l)
(ii) Phosphorous burns in chlorine gas to form phosphorous pentachloride.
The chemical equation is given as:
P₄ (s) + Cl₂(g) ⇢ PCl₅ (s)
In this equation. the number of atoms of Phosphorous (P) and Chlorine (Cl) is unequal. So, place a whole number as a stoichiometric coefficient to balance the reaction.
Hence, the balanced reaction is given as:
P₄ (s) + 10Cl₂(g) ⇢ 4PCl₅ (s)

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