Chemical Reactions and
Stoichiometry Warm ups
3/4 or 3/5
A solution of nickel (II) chloride is added to a solution of sodium
sulfide. The products are solid nickel (II) sulfide and dissolved
sodium chloride.
1. Write a chemical equation for this reaction.
2. Balance the chemical equation.
3. Identify the reaction type.
4. If I need to make 3 moles of sodium chloride, how many
moles of nickel (II) chloride should I start with?
3/8 or 3/18
Oxygen gas is bubbled through a solution of potassium
chloride to form dissolved potassium chlorate.
1. Write a complete, balanced equation.
2. What type of reaction is this? _________________
3. How many moles of potassium chloride are needed
to form 2.47 moles of potassium chlorate?
4. What changes indicate a chemical reaction?
3/19 or 3/20
1. On a note card, write at least one thing Ms.
Kruth is doing well and at least one thing she
should change/improve.
– You do NOT have to put your name on the card.
2. Complete problem 1d (it’s really the second
a) on page 11.
Warm-up 3/21 or 3/22
In our lab, 1-3 drops of Silver Nitrate solution was
added to a strip of Mg, producing solid Silver and
Magnesium Nitrate solution
1. Write the balanced chemical equation, including
state signifiers.
2. What type of reaction is this?
3. What are the mole ratios that can be formed
from this balanced equation?
4. If I started with 4.28 moles of Ag, how many
moles of Magnesium Nitrate can be produced?
5. What is meant by CdZnAgAl?
3/25 or 3/26
• Complete parts a-c for number 1 on page 12 in
your packet.
• If you finish that, continue working on parts ac on page 13.
3/25 or 3/26
Predict the products of the following reactions.
Then balance the equations.
1. ___KOH + ___H2SO4 
2. ___FeS + ___HCl 
3. ___AgNO3 + ___NaCl 
What type of reaction were all of these?
3/27 or 3/28
• Check the answers to page 13 in your packet
2. a/b 3 F2(g) + 2 AlCl3(aq)  2 AlF3(aq) + 3 Cl2(g)
c. Yes
d. 0.0368 mol F2
3. a/b Mg(s) + Pb(C2H3O2)2(aq)  Pb(s) + Mg(C2H3O2)2(aq)
c. Yes
d. 17.4 g Pb
4. a/b FeCl3(aq) + Pt(s)  NR
c. No
d. N/A
• After checking your answers, predict the products for
the reactions written on the board.
4/1 or 4/2
Will these reactions occur? If so, predict the products:
1. __ZnCl2 + __Sn 
2. __ZnCl2 + __K 
For these reactions, (1) predict the products, (2) determine
(aq) or (s), then (3) will reaction occur?
3. __KI + __Na2CO3 
4. __AgCl + __Na3PO4 
5. For reaction #2, if 52.00 g of K is used, how many
moles of Zn will be produced?
Stoichiometry Practice Answers
1.
2.
3.
4.
5.
6.
7.
8.
Coefficients
2, 1, 2
1, 2, 1, 2
2, 3, 2, 3
2, 1, 2
2, 2, 3
1, 2, 2, 1
Already balanced
Already balanced
1.
2.
3.
4.
5.
6.
7.
8.
Stoichiometry
2.82
26.4
91.6
186
1.67
0.129
17.5
175.9
4/5 or 4/8
1. Look over your Reactions & Stoichiometry
Checkpoint (picked up on your way in)
– Correct any wrong answers (with an explanation) to
earn back 5 points each
– Everyone (even if 100 ), turn it back in when finished
2. Turn in Stoichiometry Worksheet (if not its LATE)
3. Answer questions 1-4 on the bottom of page 6
in your packet (Limiting Reagents)
4. LAST, be sure you check your grades!
4/9 or 4/10
1. How many moles of H2O will be produced if
10.0 g of H2 reacts with 20.0 g of O2?
__H2 + __O2  __H2O
2. Find your success rate, in percent, for the
following situations
a) You score a 12 out of 15 on a quiz
b) You baked 29 cookies even though the recipe
said it yielded 36
c) Your goal for a fundraiser was $1000, but you
only raised $850
4/11 or 4/12
1. Determine the limiting reagent for copper
when 1.87 grams of aluminum reacts with
9.65 grams of copper (II) sulfate.
__Al + __CuSO4
→ __Cu + __Al2(SO4)3
4/11 or 4/12
• Complete the Map of Mole Land problems on
the final page of your packet.
– For the first one, use moles to moles
– For the second, use grams to moles
– For the third, use grams to grams
After the Test…
• Pick up and work on the water worksheet (this
is homework if you do not get it done in class)