Question

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)

Answer 1

Answer:

(a) x = s for solid state, y = s for solid state

(b) x = 2Ag(s)

(c) x = aq for aqueous state, y = g for gaseous state

(d) [Ugh there's no x or y here]

Hope it helps, if it does, pls mark as brainliest :))

Answer 2

Reactions

Explanation:

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

This is double displacement reaction between potassium iodide and lead nitrate which results in the formation of an yellow precipitate of lead iodide.

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

Copper and silver nitrate react to form silver preciptitate and copper nitrate.

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

When zinc is added to sulphuric acid, zinc sulphate is formed and hydrogen gas is liberated.

(d) CaCO3(s) →. ← CaO(s) + CO2(g)

When heated, calcium carbonate decomposes to form calcium oxide and carbon dixoide is liberated.