Answer
maximum amount of FeCl2 than be formed = 42.24g
formula of limiting reagent = HCl
amount of excess reagent after the reaction is complete = 4.89g
Explanation
Fe(s) + 2HCl(aq) -------> FeCl2(aq) + H2(g)
soichiometrically, 1mole of Fe react with 2moles of HCl
given moles of Fe = 23.5g/55.85g/mol = 0.4208mol
given moles of HCl = 24.3g/36.46g/mol = 0.6665mol
0.4208moles of Fe react with 0.8416moles of HCl but available moles of HCl is 0.6665mol ,so
Limiting reagent is HCl
stoichiometrically, 2moles of HCl gives 1moles of FeCl2
moles of FeCl2 obtained by 0.6665moles of HCl = 0.6665mol/2 = 0.33325mol
maximum amount of FeCl2 that can be formed = 0.33325mol × 126.75g/mol=42.24g
number of moles of Fe react with 0.6665moles of HCl= 0.6665mol/2 = 0.33325mol
mass of Fe reacted = 0.33325mol × 55.85g/mol = 18.61g
mass of Fe remaining after reaction = 23.5g - 18.61g = 4.89g
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