BCLN CHEMISTRY 11 - Rev. July/2014
Unit 3 ~ Learning Guide Name:
Instructions:
Using a pencil, complete the following notes as you work through the related lessons. Show ALL
work as is explained in the lessons. You are required to have this package completed BEFORE
you write your unit test. Do your best and ask questions if you don’t understand anything!
Combining Capacity and Naming Compounds:
1. Certain groups (columns) on the periodic table have combining capacities (also known as
charges) that you should memorize. Understanding that there is a pattern to these charges will
help you do that. Fill in the table below to see the pattern.
Period
Combining Capacity
+1
1
+2
2
+3
13
14
Do not usually form ions but if they do the charge is +4 or -4
-3
15
-2
16
-1
17
18
Do not form ions!
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BCLN CHEMISTRY 11 - Rev. July/2014
2. Determine the combining capacity of iron in the compound FeCl3. Show your work!
Fe + 3Cl = 0
Fe + 3 (-1) = 0
Fe + (-3) = 0
Fe = +3
3. Determine the combining capacity of lead in the compound Pb3P2. Show your work!
3Pb + 2P = 0
3Pb + 2 (-3) = 0
3Pb + (-6) = 0
3Pb = 6
Pb = +2
4. Provide names for the following Group 1/2 Ionic Compounds
Formula
Name
Beryllium oxide
BeO
Barium phosphide
Ba3P2
5. Provide names for the following Molecular/Covalent Compounds
Formula
Name
SiO4
Silicon tetroxide
Trinitride monoxide
N3O
Triphosphide octoxide
P3O8
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BCLN CHEMISTRY 11 - Rev. July/2014
6. There are a number of chemicals which have common names that you should know. Fill in the
table below to help you memorize these. Use the internet to find a food that each of these is
found in or something they are used for.
Formula
CH3OH
C2H5OH
C6H12O6
C12H22O11
H2O
H2O2
O3
NH3
Name
Food or Use
Methanol
Used as a pesticide
Bear
ethanol
Glucose
Candy
sucrose
Brown sugar
Apple Juice
water
Hydrogen Peroxide
Used for food disinfection
ozone
Vegetables disinfection
Ammonia
Used as a fertilizer
Writing the Formula of a Compound:
1. Provide formulas for the following Ionic Compounds. Use the work box to show how you
balanced the combining capacities.
Name
Work
Formula
Mg(+2)+O(-2)=0
Mg + O = 0
MgO
magnesium oxide
aluminum sulfate
Al(+3) + S(-2) =0
2Al + 3S = 0
Al2S3
iron (III) hydroxide
Fe(+3) + H(-1) = 0
Fe+ 3H = 0
FeH3
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BCLN CHEMISTRY 11 - Rev. July/2014
2. Provide formulas for the following Covalent Compounds.
Name
Formula
fluorine monobromide
FBr
pentasulfur heptaselenide
S5Se7
carbon tetrachloride
CCl4
3. If you see H2O at the end of a compound's formula what word must go at the end of the
compound's name?
hydrate
.
Multivalent Metals and Polyatomic Ions:
1. Provide names for the following Ionic Compounds which contain multivalent metal. Use the
work box to show how you determined the correct Roman Numeral to use.
Formula
Work
Name
Cobalt（Ⅱ) sulfide
FeS
Fe + S = 0
Fe + (-2) = 0
Fe = + 2
Ni2O3
2Ni + 3(-2) = 0
2Ni = 6O
Ni = + 3
nickel(Ⅲ) oxide
PtO2
Pt + 2O = 0
Pt + 2(-2) = 0
Pt = + 4
Platinum(Ⅳ) oxide
Sb3P5
3Sb + 5P = 0
3Sb + 5(-3) = 0
3Sb = 15P
Sb = +5
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antimony(Ⅴ) phosphide
BCLN CHEMISTRY 11 - Rev. July/2014
2. What prefix is used as a replacement for the word hydrogen in some polyatomic ions?
Bi
3. Name the following ternary compounds. The easy way to recognize that these are all ternary
compounds is that they all contain at least 3 elements which means the formula will have at
least 3 capital letters. Remember to use your data table to name the polyatomic ions correctly.
Some of these will require roman numerals but some will NOT. If a roman numeral is
required show your work.
Formula
Work
Name
AuClO
Au + ClO(-1) = 0
Au + (-1) = 0
Au = +1
gold(Ⅰ) hypochlorite
(
Sr3 PO4)2
Bi(CN)5
Hg3PO4
3Sr + 2 PO4 = 0
3Sr + 2(-3) = 0
3Sr = 6
Sr = +2
Bi + 5 CN = 0
Bi + 5(-1) = 0
Bi = +5
3Hg + PO4 = 0
3Hg + (-3) = 0
3Hg = 3
Hg = +1
strontium phosphate
Bismuth(Ⅴ) cyanide
Mercury(Ⅰ) phosphate
CaSO3
Ca + SO3 = 0
Ca + (-2) = 0
Ca = +2
Calcium sulphite
(NH4)2S
2NH4 + s = 0
2(-1)+S = 0
S=+2
Ammonium sulfide
Na3BO3
3Na + BO3 = 0
3Na + (-3) = 0
Na = -1
Sodium borate
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BCLN CHEMISTRY 11 - Rev. July/2014
Names and Formulas of Acids
1. Name the following acids. Remember to use the prefix hydro if the acid contains a simple
element. If the acid contains a polyatomic ion you change an ate ending to ic and you change an
ite ending to ous.
Formula
Name
H2S
Hydrosulfuric acid
H2SO4
Sulfuric Acid
H2SO3
Sulfurous acid
2. Provide formulas for the following acids. Be sure to use the correct number of hydrogen atoms to
match the charge on the negative ion.
Name
Formula
hydroiodic acid
HClO
hydrophosphoric acid
HOCl
phosphoric acid
H3PO4
nitrous acid
HNO2
3. Acids formulas usually start with H. Organic acids however will END with an H. What is the
name and formula of the polyatomic ion that you will always find at the end of a base?
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BCLN CHEMISTRY 11 - Rev. July/2014
Overall Unit 3 Review:
1. Name or write the formula & state whether the substance is Ionic (M), Ionic (I), Acid (A),
Element (E). Note that (aq) simply means the compound dissolves in water and will not affect
the name
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Type
M, I, A or E
Chemical Name
Chemical Formula
M
sodium chloride
NaCl
M
Calcium Carbonate
CaCO3
I
nickel (III) bisulfate
NiS2
A
sodium hydroxide
NaOH
M
Calcium oxide
CaO
M
Magnesium Sulfate heptahydrate
MgSO4•7H2O
M
carbon dioxide
CO2
A
acetic acid
CH3COOH
E
carbon
C
M
calcium sulfate
CaSO4
M
Sodium silicate
Na2SiO3
M
Calcium bicarbonate
Ca(HCO3)2
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BCLN CHEMISTRY 11 - Rev. July/2014
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
M
magnesium hydroxide
Mg(OH)2
M
potassium chloride
KCl
M
sodium thiosulphate pentahydrate
NaS2O3 5H2O
M
sodium hypochlorite
NaClO
M
Sodium carbonate
Na2CO3
A
Hydrogen chloride
HCl (aq)
M
potassium nitrate
KNO2
M
Copper sulphate pentahydrate
CuSO4•5H2O
E
magnesium
Mg
M
magnesium oxide
MgO
M
Potassium iodide
KI
A
Sulfuric acid
H(aq)
M
silicon monocarbide
SiC
E
Iron
Fe
M
Ammonium chloride
NH4Cl
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BCLN CHEMISTRY 11 - Rev. July/2014
It is important that you are able to count the number of each type of atom in a formula. Each atom will
have as many as 3 numbers that "belong" to it. If a number comes directly after the atom then it belongs
to that atom. If an atom is inside a bracket then the number after the bracket belongs to that atom. Finally
if there is a number in front of the compound (known as a coefficient) then that number belongs to all of
the atoms.
Here is an example:
3 Fe2(SO4)3
Fe:
Fe has its own number 2 and the 3 at the front. Therefore we have 3 x 2 = 6 Fe atoms
S:
S does not have its own number which means you start with 1. However it is inside the bracket
and you have a 3 out front. Therefore we have 1 x 3 x 3 = 9 S atoms
O:
O has its own number 4, the 3 after the bracket and the 3 in front.
Therefore we have 4 x 3 x 3 = 36 O atoms
2. Determine the number of each type of atom in the following compounds. Show your work where
appropriate (which numbers you multiplied to get each atom)
Formula
Atoms
CuBr2
1 Cu atom, 2 Br atoms
Ca(MnO4)2
1 Ca atom, 2 Mn atoms, 8 O atoms
2 CH3COOH
4 Hf(HPO4)2
4 C atoms, 4 O atoms, 8 H atoms
4 Hf atoms, 8 H atoms, 8 P atoms, 32 O atoms
2. A sample of Zr(H2PO4)4 that contains 6 000 oxygen atoms must also contain how many hydrogen
atoms? Hint use a unit conversion to convert from O atoms to H atoms
Each Zr(H2PO4)4 has 16 oxygen atoms
375 numbers of Zr(H2PO4)4 have 6000 oxygen atoms
375 × 4 × 2 = 3000
Answer is 3000 hydrogen atoms
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BCLN CHEMISTRY 11 - Rev. July/2014
Answers:
Combining Capacity and Naming Compounds:
1.
+1, +2, +3, None, -3, -2, -1
2. +3
3. +2
Multivalent Metals and Polyatomic Ions:
1. These are the correct Roman Numerals: II, III, IV, and V
3. Three of the formulas require Roman Numerals. They are I, V and I
Overall Unit 3 Review:
1. 20) Roman Numeral is II
2.
Formula
Atoms
CuBr2
1 Cu atom, 2 Br atoms
Ca(MnO4)2
1 Ca atom, 2 Mn atoms, 8 O atoms
2 CH3COOH
4 C atoms, 4 O atoms, 8 H atoms
4 Hf atoms, 8 H atoms, 8 P atoms, 32 O atoms
4 Hf(HPO4)2
3. 3000 H atoms
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