In the chemical reaction:
Cu + 2AgNO3 → 2Ag + Cu(NO3)2
What is the limiting reactant if you start with 1.8 moles of copper and 2.0 moles of silver nitrate?
Chemistry, limiting reactants?
2017-08-10 1:02 am
回答 (2)
2017-08-10 1:15 am
Initial no. of moles of Cu = 1.8 mol
Initial no. of moles of AgNO₃ = 2.0 mol
Cu + 2AgNO₃ → 2Ag + Cu(NO₂)₂
Mole ratio Cu : AgNO₃ = 1 : 2
When AgNO₃ completely reacts :
No. of moles of Cu needed = (2.0 mol) × (1/2) = 1.0 mol < 1.8 mol
Hence, Cu is in excess, and thus AgNO₃ is the limiting reactant.
Initial no. of moles of AgNO₃ = 2.0 mol
Cu + 2AgNO₃ → 2Ag + Cu(NO₂)₂
Mole ratio Cu : AgNO₃ = 1 : 2
When AgNO₃ completely reacts :
No. of moles of Cu needed = (2.0 mol) × (1/2) = 1.0 mol < 1.8 mol
Hence, Cu is in excess, and thus AgNO₃ is the limiting reactant.
2017-08-10 4:33 am
Silver nitrate because
the molar ratios are 1 : 2
So by equivalence
1 : 2 :: 1.8 : 3.6
Hence 3.6 moles (AgNO3) is required , but you only haave 2.0 moles. Hence Silver Nitrate is the limiting reagent.
the molar ratios are 1 : 2
So by equivalence
1 : 2 :: 1.8 : 3.6
Hence 3.6 moles (AgNO3) is required , but you only haave 2.0 moles. Hence Silver Nitrate is the limiting reagent.
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