Question

Write the balanced chemical equations for the following :

i)Calciumchloride +Zinc sulphate → Zinc chloride +Calciumsulphate

ii)potassiumhydroxide+Nitric acid → potassiumnitrate +Water

iii)potassiumchloride +Sulphuric acid → potassiumbisulphate+Hydrochloric acid

iv)Calcium oxide + hydrochloric acid → Calciumchloride +Water

v)Sodium hydroxide +Hydrochloric acid → Sodiumchloride+Water​

Answer 1

Answer:

1. CaCl2 + ZnSO4 = ZnCl2 + CaSO4
2. KOH + HNO3 = KNO3 + H2O
3. KCl + H2SO4 = KHSO4 + HCl
4. CaO + 2HCl = CaCl2 + H2O
5. NaOH + HCl = NaCl + H2O

Explanation:

1. This is a precipitation reaction: CaSO4 is the formed precipitate.

2. This is an acid-base reaction (neutralization): KOH is a base, HNO3 is an acid.

3. This reaction takes place at a temperature of 30-50.

4. Calcium carbonate is not very soluble in water. This is an acid-base reaction (neutralization): CaO is a base, HCl is an acid.

5. This is a double decomposition reaction.

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