posted by Anonymous
An excess of aqueous AgNO3 reacts with 43 mL of 5 M K2CrO4(aq)to form a precipitate. what is it? What mass of precipitate is formed?
answer in g
2AgNO3 + K2Cr2O7 ==> Ag2Cr2O7 + 2KNO3
mols K2Cr2O7 = M x L = ?
mols Ag2Cr2O7 =mols K2Cr2O7
Then g Ag2Cr2O7 = mols Ag2Cr2O7 x molar mass A2Cr2O7