Question
For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants?
2Na(s)+Br2(g) ---->2NaBr(s)
1.
2mol Na, 2mol Br2
2.
1.8mol Na, 1.4mol Br2
3.
2.5mol Na, 1mol Br2
4.
12.6mol Na, 6.9 mol Br2
2Na(s)+Br2(g) ---->2NaBr(s)
1.
2mol Na, 2mol Br2
2.
1.8mol Na, 1.4mol Br2
3.
2.5mol Na, 1mol Br2
4.
12.6mol Na, 6.9 mol Br2
Answers
DrBob222
#1.
2 mol Na needs 1/2 mol Br2. You have more than enough Br2 so the limiting reagent is Na.
#2.
1.8 mol Na needs 1.8 mols Na x (1 mol Br2/2 mols Na) = 1.8 x 1/2 = 0.9 mols Br2 and you have more than enough so the LR is Na.
2 mol Na needs 1/2 mol Br2. You have more than enough Br2 so the limiting reagent is Na.
#2.
1.8 mol Na needs 1.8 mols Na x (1 mol Br2/2 mols Na) = 1.8 x 1/2 = 0.9 mols Br2 and you have more than enough so the LR is Na.
canuck
okay but how bout the rest eh b'y