Al(OH)3(s)+3HCl(aq)→AlCl3(aq)+3H2O(l)
1. Calculate the number of grams of HCl that can react with 0.440 g of Al(OH)3.
2. Calculate the number of grams of AlCl3 formed when 0.440 g of Al(OH)3 reacts.
3. Calculate the number of grams of H2O formed when 0.440 g of Al(OH)3 reacts.
1)
Molar mass of Al(OH)3,
MM = 1*MM(Al) + 3*MM(O) + 3*MM(H)
= 1*26.98 + 3*16.0 + 3*1.008
= 78.004 g/mol
mass of Al(OH)3 = 0.44 g
mol of Al(OH)3 = (mass)/(molar mass)
= 0.44/78
= 5.641*10^-3 mol
Balanced chemical equation is:
Al(OH)3(s)+3HCl(aq)→AlCl3(aq)+3H2O(l)
According to balanced equation
mol of HCl reacted = (3/1)* moles of Al(OH)3
= (3/1)*5.641*10^-3
= 1.692*10^-2 mol
Molar mass of HCl,
MM = 1*MM(H) + 1*MM(Cl)
= 1*1.008 + 1*35.45
= 36.458 g/mol
mass of HCl = number of mol * molar mass
= 1.692*10^-2*36.46
= 0.6169 g
Answer: 0.617 g
2)
According to balanced equation
mol of AlCl3 formed = moles of Al(OH)3
= 5.641*10^-3 mol
Molar mass of AlCl3,
MM = 1*MM(Al) + 3*MM(Cl)
= 1*26.98 + 3*35.45
= 133.33 g/mol
mass of AlCl3 = number of mol * molar mass
= 5.641*10^-3*1.333*10^2
= 0.7521 g
Answer: 0.752 g
3)
According to balanced equation
mol of H2O formed = (3/1)* moles of Al(OH)3
= (3/1)*5.641*10^-3
= 1.692*10^-2 mol
Molar mass of H2O,
MM = 2*MM(H) + 1*MM(O)
= 2*1.008 + 1*16.0
= 18.016 g/mol
mass of H2O = number of mol * molar mass
= 1.692*10^-2*18.02
= 0.3049 g
Answer: 0.305 g
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