Ni_(s) + 2 Na^+ _(aq) rightarrow Ba(OH)_2(aq) + H_2SO_4_(aq) rightarrow NH_3(aq)

Question

Ni_(s) + 2 Na^+ _(aq) rightarrow Ba(OH)_2(aq) + H_2SO_4_(aq) rightarrow NH_3(aq) + HCIO_4(aq) rightarrow HCO_3^-(aq) + OH^-(aq) rightarrow NH_4CI_(aq) + Li_3PO_4(aq) rightarrow Pb(NO_3)_2(aq) + MgSO_4(aq) rightarrow Write a balanced formula unit and a net ionic equation for the following reaction. Include the states (s, l, g, or aq) of all reactants and products. zinc chloride + lithium hydroxide rightarrow zinc hydroxide + lithium chloride When Co(NO_3)_2 solution is mixed with limited NH_3aq, a precipitate forms. When excess NH_3aq is added, the precipitate dissolves. Write balanced formula unit and net ionic equations for these observations. Include the states (s, l g, or aq) of all reactants and products.

Explanation / Answer

(8)

Molecular equation

ZnCl2 (aq.) + 2 LiOH (aq.) -----------> Zn(OH)2 (s) + 2 LiCl (aq.)

IOnic equation

Zn2+ (aq.) + 2 Cl- (aq.) + 2 Li+ (aq.) + 2 OH- (aq.) -----> Zn(OH)2 (s) + 2 Li+ (aq.) + 2 Cl- (aq.)

Net ionic equation:

Zn2+ (aq.) + 2 OH- (aq.) ------------> Zn(OH)2 (s)

(9)

Co(NO3)2 (aq.) + NH4OH (aq.) ---------> Co(OH)2 (s) + NH4NO3 (aq.)

net ionic equation: Co2+ (aq.) + 2 OH- (aq.) ---------> Co(OH)2 (s)

Co(OH)2 (s) + 6 NH4OH (aq.) -------------> [Co(NH3)6](OH)2 (aq.) + 6 H2O (l)

Net ionic equation:

Co(OH)2 (s) + NH4+ + 6 OH- (aq.) --------> [Co(NH3)6]2+ (aq.) + 6 H2O (l)

(92)

(c) no reaction

(d) Ba(OH)2 (aq.) + H2SO4 (aq.) -----------> BaSO4 (s) + 2 H2O (l)

(e) NH3 (aq.) + HClO4 (aq.) -------------> NH4ClO4 (aq.)

(f) HCO3- (aq.) + OH- (aq.) -------------> CO32- (aq.) + H2O (l)

(g) no net reaction occurs

(h) Pb(NO3)2 (aq.) + MgSO4 (aq.) -----------> PbSO4 (s) + Mg(NO3)2 (aq.)

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