Complete the missing components/variables given as x and y in the following reactions: (a) Pb(NO 3 ) 2 (aq) + 2Kl(aq) → PbI 2 (x) + 2KNO 3 (y) (b) Cu(s) + 2AgNO 3 (aq) → Cu(NO 3 ) 2 (aq) + x (c) Zn(s) + H 2 SO 4 (aq) → ZnSO 4 (x) + H 2 (y) (d) CaCO 3 (s) CaO(s) + CO 2 (g)

Question

Philoid · Accepted Answer

(a) Pb(NO₃)₂(aq) + 2Kl(aq) → PbI₂(s) + 2KNO₃(aq)

Hence, x is (s) and y is (aq) (s) means PbI₂ exists in solid state and (y) means that KNO₃ exists in aqueous/liquid state.

(b) Cu(s) + 2AgNO₃(aq) → Cu(NO₃)₂(aq) + 2Ag(s)

Hence, x is Ag(s) In the above reaction, Ag gets replaced by Cu.

(c) Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g)

Hence, x is (aq) and y is (g) (aq) means copper sulphate formed exists in aqueous state. (g) means hydrogen gas is liberating.

(d)

Hence x is heat

When CaCO₃ is heated in the presence of oxygen, it forms calcium oxide (CaO) and carbon dioxide.

Complete the missing components/variables given as x and y in the following reactions:(a) Pb(NO3)2(aq) + 2Kl(aq) → PbI2(x) + 2KNO3(y)(b) Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + x(c) Zn(s) + H2SO4(aq) → ZnSO4(x) + H2(y)(d) CaCO3(s) CaO(s) + CO2 (g)

Complete the missing components/variables given as x and y in the following reactions:
(a) Pb(NO₃)₂(aq) + 2Kl(aq) → PbI₂(x) + 2KNO₃(y)

(b) Cu(s) + 2AgNO₃(aq) → Cu(NO₃)₂(aq) + x

(c) Zn(s) + H₂SO₄(aq) → ZnSO₄(x) + H₂(y)

(d) CaCO₃(s) CaO(s) + CO₂ (g)