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Engineering

Chemistry

Compounds of Alkali Metals

Alkaline Earth Metals and Properties

Test of Cations and Anions

Question

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Pb⁺²with dil H₂SO₄ gives white ppt which is soluble in dil. HNO₃

Pb⁺² with NaOH gives white ppt which is soluble in excess amount of NaOH.

Pb⁺² with KCN gives white ppt which is soluble in excess amount of KCN.

Pb⁺² with disodium hydrogen phosphate gives white precipitate which is soluble in NaOH.

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$(B) {Pb}^{+ 2} dil H_{2} {SO}_{4} \to \underset{white ppt .}{{PbSO}_{4} ↓} \overset{insoluble in dil {HNO}_{3}}{\to}$

$(C) {Pb}^{+ 2} + 2 KCN \to \underset{white ppt .}{Pb {(CN)}_{2} ↓} \overset{excess KCN}{\to} \overset{insoluble}{\to}$

$(D) {Pb}^{+ 2} + {Na}_{2} {HPO}_{4} \overset{}{⇌} \underset{white ppt .}{{Pb}_{3} {({PO}_{4})}_{2} ↓} \overset{soluible in NaOH}{\to}$