Same chapter3 marksDifficulty: Medium
Why is concentrated sulphuric acid not used in place of dilute hydrochloric acid to prepare hydrogen sulphide from iron(II) sulphide?
Study of Acids, Bases and Salts
3 marksDifficulty: Medium
Name three methods by which a soluble salt can be prepared, giving one equation for each.
Original Khojo Papers practice question — not from a past board paper.
Answer
By neutralisation: NaOH + HCl → NaCl + H2O. By the action of a dilute acid on a metal: Zn + H2SO4 → ZnSO4 + H2. By the action of a dilute acid on a carbonate: Na2CO3 + 2HCl → 2NaCl + H2O + CO2.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
An insoluble salt is prepared instead by precipitation, mixing two soluble salts.
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