2/20 & 2/23
Homework Turn In
• Put lab book in cabinet
• Do not tear out copies
Homework
• Synthesis reactions Pg 11 #1-7
• Test moved to Friday/Monday
Warm-up
• Pg 1 # 1
• Zinc forms an ionic compound with an oxyanion.
The formula is 44.97% Zn and 22.02% S. What is
the formula and name of the compound?
• Answer? Mol Zn = 44.97 g Zn
? Mol S = 22.02 g S
1 mol Zn
65.39 g
1 mol S
32.056 g
? Mol O = (100-66.99) g O
=1
= 0.68692 mol
0.68772 mol
= 0.9988
1 mol O = 2.0644 mol
15.99 g
Formula: ZnSO3
= 0.68772 mol
0.68772 mol
0.68772 mol
Name: Zinc Sulfite
=3.00
Synthesis Rxns pg 11 in the Packet
There are 4 types of synthesis
rxns.
With your partner read and
paraphrase each rxn type.
•
•
•
•
Student A reads # 1
Student B reads #2
Student A reads #3
Student B reads #4
Next, try these examples!
1. Copper (I) is mixed with sulfur
2. Calcium oxide is dissolved in
water.
3. Carbon dioxide reacts with
iron (II) oxide.
Answers
1. Copper (I) is mixed with sulfur
2Cu(s) + S(s)  Cu2S(s)
2. Calcium oxide is dissolved in water.
CaO(s) + H2O(l)  Ca(OH)2(aq)
3. Carbon dioxide is bubbled into an iron (II) oxide
solution.
CO2(g) + FeO(aq)  FeCO3(aq)
Mixed Review for the Test next class
• You will now do a mixed review for all the reaction
types we have studied.
• This is a good indication of test questions. Consider it a
test review!
• You will work with your shoulder partner to answer
the questions. You must show your OWN work!
• Please number all problems. Work will be due at
the end of class.
• The questions will rotate clockwise around the
classroom every 3 minutes.
• If you do not finish a question there will be time at
the end to go back to the ones you missed.
Reaction Practice #1
Write the balanced chemical equation with state
signifiers for the following reaction:
Calcium hydroxide (aq) reacts with phosphoric acid (aq).
Reaction Practice #2
Write the balanced chemical equation with state
signifiers for the following reaction:
Barium chloride and sodium sulfate react.
Reaction Practice #3
Write the balanced chemical equation with state
signifiers for the following reaction:
Hydrochloric acid is dripped onto solid calcium
carbonate.
Reaction Practice #4
Write the balanced chemical equation for the following
reaction:
Solid magnesium reacts with iodine vapor.
Reaction Practice #5
Xylitol is a sugar alcohol used in chewing gum. Its
chemical formula is C5H7(OH)5.
Write the balanced chemical equation for the
combustion of xylitol.
Reaction Practice #6
Examine the following chemical equations. There are
mistakes in the chemical formulas. Correct the mistakes
and balance the equations.
A) Zn + HCl → ZnCl + H
B) CaSO4 + AlBr3  CaBr3 + AlSO4
C) KPO4 + HCl2  KCl2 + HPO4
Reaction Practice #7
Write the balanced chemical equation for the following
reaction:
Chromium(III) perchlorate is heated over a flame.
Reaction Practice #8
Write the balanced chemical equation for the following
reaction:
Cobalt(IV) carbonate is heated over a flame.
Reaction Practice #9
Write the balanced chemical equation for the following
reaction:
Bismuth (V) hydroxide is heated over a flame.
Reaction Practice #10
Write the balanced chemical equation for the following
reaction:
Nickel(I) oxide reacts with water.
Reaction Practice #11
Write the balanced chemical equation for the following
reaction:
Nickel(I) oxide and carbon dioxide react.
Reaction Practice #12
Write the balanced chemical equation for the following
reaction:
Sulfur dioxide is bubbled into water.
Reaction Practice #13
Write the balanced chemical equation for the following
reaction:
Zinc sulfide is electrolyzed.
Reaction Practice #14
Write the balanced chemical equation with state
signifiers for the following reaction:
Solid magnesium is placed in an iron(III) chloride solution.
Reaction Practice #15
Write the balanced chemical equation with state
signifiers for the following reaction:
Sulfurous acid is warmed.
Reaction Practice #16
Write the balanced chemical equation with state
signifiers for the following reaction:
Solid ammonium carbonate is a compound used in
baking. Write the reaction that occurs when it is heated.
Reaction Practice #17
Write the balanced chemical equation with state
signifiers for the following reaction:
Aqueous barium hydroxide and ammonium nitrate are
combined.
Reaction Practice #18
Write the balanced chemical equation with state
signifiers for the following reaction:
Solid aluminum is submerged in a sulfuric acid solution.
Reaction Practice #19
Identify the type of reaction and use the appropriate
reference material to determine whether each will occur.
a)
b)
c)
d)
Na + H2O  NaOH + H2
Cu + Zn(NO3)2  Cu(NO3)2 + Zn
Mg(NO3)2 + K3PO4  Mg3(PO4)2 + KNO3
NaCl + F2  NaF + Cl2
Reaction Practice #20
Deoxyribose is the sugar in DNA, deoxyribonucleic acid.
Its chemical formula is C5H10O4.
Write the balanced chemical equation for the
combustion of deoxyribose.