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Posted on 2017-06-07 18:39:00 in Chemistry by ANEL BELL

1. 2PbS(s) + 3O2(g) + C(s) 2Pb(s) + CO2(g) + 2SO2(g) 

Which concentration(s) would be included in the denominator of the equilibrium constant expression? 

Pb(s), CO2(g), and SO2(g) 
PbS(s), O2(g), and C(s) 
O2(g), Pb(s), CO2(g), and SO2(g) 
O2(g) 

2. The solubility product of cadmium carbonate, CdCO3, is 1.0 × 10-12. In a saturated solution of this salt, the concentration of Cd2+(aq) ions is ________. 

5.0 × 10-13 mol/L 
× 10-12 mol/L 
× 10-6 mol/L 
5.0 × 10-7 mol/L 

3. Which change can cause the value of the equilibrium constant to change? 

temperature 
concentration of a reactant 
concentration of a product 
None of the above 

4. A chemical reaction is in equilibrium when ________. 

forward and reverse reactions have ceased 
the equilibrium constant equals 1 
forward and reverse reaction rates are equal 
no reactants remain

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