3. Using three criteria for double displacement reactions, together with the Sol

Question

3. Using three criteria for double displacement reactions, together with the Solubility Table in Appendix 2, predict whether a double displacement reaction will occur in each exam- ple below. If reaction will occur, complete and balance the equation, properly indicating gases and precipitates. If you believe no reaction will occur, write "no reaction" as the right-hand side of the equation. All reactants are in aqueous solution. (a) (b) (c) (d) K2S + CuSO4- NH,OH + H,C204- KOH + NH,CI NaC2H,02+ HCl (f) (NH,),so, + NaCl- (g) BiClNaOH (h) KC,H,02 + Coso,- (i) Na,co, + HN03- - 94

Explanation / Answer

a)

K2S(aq)+ CuSO4(aq) = CuS(s) + K2SO4(aq)

solid forms

b)

neutralizaiton will occur

2NH4OH + H2C2O4 = 2H2O(l) + (NH4)2C2O4

liquid water forms

c)

this is storng base + weak acid

KOH + NH4Cl = NH3(g) + H2O(l) + KCl(aq)

due to heat application, NH3(aq) forsm NH3(g)

d)

there will be ionization of aqueous acid

NaC2H3O2(aq) + HCl(aq) -- >HC2H3O2(aq) + NaCl(aq)

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