Which of these compounds is a strong electrolyte? H_2O N_2 CH_3COOH (acetic acid

Question

Which of these compounds is a strong electrolyte? H_2O N_2 CH_3COOH (acetic acid) C_2H_6O (ethanol) KOH Based on the solubility rules, which one of these compounds should be insoluble in water? Na_2SO_4 BaSO_4 MgSO_4 Rb_2SO_4 In the following reaction, what ions, if any, are spectator ions? Pb(NO_3)_2 (aq) + 2 NaCl (aq) rightarrow PbCl_2 (s) + 2NaNO_2(aq) Pb^2+ (aq), Cl^- (aq) Na^+ (aq), NO^+_3 (aq) Pb^2+ (aq), NO^-_3 (aq) Na^+ (aq), Cl^- (aq) There are no spectator ions. Which of the following is oxidized in the following reaction? Fe + Ag_2O rightarrow FeO + 2Ag Ag Ag_2O Fe FeO 2Ag

Explanation / Answer

1. E. NaOH

All strong bases are strong electrolytes

2. B. BaSO4

BaSo4 is insoluble solid.

3. B Na^+, NO3^-

Pb(NO3)2 (aq) + 2NaCl (aq) ------------> PbCl2(s) + 2NaNO3(aq)

Pb+2(aq)+2(NO3)- (aq) + 2Na+(aq)+2Cl- (aq) ------------> PbCl2(s) + 2Na+(aq) +2NO3-(aq)

spectetor ions are Na+ , NO3-ions

Pb+2(aq)+2Cl- (aq) ------------> PbCl2(s) net ionic equation

4. C. Fe

Fe + Ag2O ------> FeO + 2Ag

in this equation Fe oxidation number is increases from 0 to +2

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