If the identity of either unknown is ambiguous, describe why you think it is amb

Question

If the identity of either unknown is ambiguous, describe why you think it is ambiguous and name which substances you think the unknown might be and why. Be concise - do not list the result of each test carried out on the unknowns. Some of the reactions produced a gas. What is the gas that was formed in these reactions? Name the ionic compound that created the gas: What is the class name of the other substance involved in these reactions? Write a balanced chemical equation for one of the gas-forming reactions. Pick four reactions with lead (IT) nitrate that form precipitates For each reaction write out BALANCED equations Complete Molecular Equation Complete Ionic Equation Net Ionic Equation Name the Spectator Ions

Explanation / Answer

CaCO3 + H2SO4 -----> CaSO4 + CO2 + H2O

Co2 gas formed in the reaction

CaCo3 ionic compound creat the CO2 gas

H2SO4

Pb(NO3)2 +2 KI -----> PbI2(s) + 2KNO3(aq)

ionic equation

Pb+2+2(NO3)- +2 K++I ------> PbI2(s) + 2K+(aq)+2NO3-(aq)

removal of spector ions

Pb+2 + 2I- -----> PbCl2(s)

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