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Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution...

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 7.00 g of sodium carbonate is mixed with one containing 4.75 g of silver nitrate. After the reaction is complete, the solutions are evaporated to dryness, leaving a mixture of salts. How many grams of each of the following compounds are present after the reaction is complete?

sodium carbonate

silver nitrate

silver carbonate

sodium nitrate

Solutions

Expert Solution

no of moles of Na2CO3   = W/G.M.Wt

                                      = 7/106   = 0.066moloes

no of moles of AgNO3   = W/G.M.Wt

                                    = 4.75/169.87     = 0.028moles

Na2CO3(aq) + 2AgNO3(aq) -------------> Ag2CO3(s) + 2NaNO3(aq)

1 mole of Na2CO3 react with 2 moles of AgNO3

0.066moles of Na2Co3 react with = 2*0.066/1   = 0.132moles of AgNO3 is required

AgNO3 is limiting reactant

2 moles of AgNO3 react with excess of Na2CO3 to gives 1 mole of Ag2CO3

0.028moles of AgNO3 react with excess of Na2CO3 to gives = 1*0.028/2   = 0.014 moles of Ag2CO3

mass of Ag2CO3 = no of moles * gram molar mass

                            = 0.014*275.7453   = 3.86g

2 moles of AgNO3 react with excess of Na2CO3 to gives 2 mole of NaNO3

0.028moles of AgNO3 react with excess of Na2CO3 to gives   = 2*0.028/2 = 0.028 moles of NaNO3

mass of NaNO3 = no of moles * gram molar mass

                          = 0.028*84.9947

                          = 2.38g

2 moles of AgNO3 react with 1 mole of Na2CO3

0.028 moles of AgNO3 react with = 1*0.028/2   = 0.014moles of Na2Co3

Na2CO3 is excess reactant

The no of moles of Na2CO3 left after complete the reaction = 0.066-0.014   = 0.052 moles of Na2CO3

mass of Na2CO3 = no of moles * gram molar mass

                           = 0.052*106   = 5.512g

The mass of AgNO3 is 0g after complete the reaction because of it is limiting reactant


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