Transcript Chemistry 100 - University of Illinois at Urbana–Champaign

To Do…

Electronic homework (Lon-Capa)



HW4 Type 1 due Monday, March 10 by 7 pm;
HW4 Type 2 due Wednesday, March 12 by 7 pm
HW5 Type 1 due Monday, March 17 by 7 pm;
HW5 Type 2 due Wednesday, March 19 by 7 pm
Exam 2 review: due Wednesday, March 19 by
7pm
Exam #2: Thursday, March 20, 7 pm
p199
p199
Method 1: Have vs. Need



Compare what you HAVE with what you
NEED.
The limiting reactant determines the
amount of product.
The amount of leftover reactant is the
difference between what you HAVE and
what you NEED.
Method 2: Maximum Product



Determine the maximum amount of
product from each reactant.
The reactant which produces the least
amount of product is the limiting
reactant.
The least amount of product is the
amount of product formed.
Method 3: ICE Table




Set up ICE Table [Initial, Change, End].
Amounts must be in terms of number
of moles.
At least one reactant is completely used
up (goes to zero at End).
Change row: same ratio as the
balanced equation.
Starting With Masses
You react 84 g of N2(g) with 22 g H2(g)
to produce ammonia [NH3(g)].


Determine the mass of ammonia
produced.
Determine the mass of left-over
reactant.