Download groups (families) vs rows

I will require that you show all of your work on practice problems and exams.
IDENTIFYING THE NUMBER OF SIG FIGS
Determine the correct number of significant figures.
1.
1008
______
2.
4.440
______
3.
0.0099
______
4.
7.0700
______
5.
50.05
______
SIGNIFICANT FIGURES CALCULATIONS
Show your answer with the correct number of significant digits.
1.
190.2 g + 65.291 g + 12.38 g = ?
2.
13.78 g
11.3 ml
3.
45.761 g - 42.65 g =
4.
5.761 cm x 6.20 cm =
5.
11.00 m x 12.10 m x 3.53 m =
1.
GROUPS (FAMILIES) VS ROWS
Which element is in group 7 and row 5 ?
_________________
2.
Which element is in group 4 and row 7 ?
3.
Which element is in the halogen family and in row 2 ? _________________
4.
Which element is in the alkaline earth metal family and row 6 ?
5.
Which element is in the alkali metal family and row 4 ?
1.
DIMENSIONAL ANALYSIS
How many seconds are in 2.5 hours?
______
2.
How many meters is 33,855 inches?
=
_________________
______
_____________
_________________
MONATOMIC/DIATOMIC/POLYATOMIC IONS
Determine whether the following ions are monatomic, diatomic or polyatomic.
1.
SO4-2
_____________
2.
F2
_____________
3.
NO3-1
_____________
4.
Ca+2
_____________
5.
N-3
_____________
LIST THE 7 DIATOMIC MOLECULES
1.
___________
4.
___________
2.
___________
5.
___________
3.
___________
6.
___________
7.
___________
DISTINGUISH BETWEEN IONIC AND COVALENT COMPOUNDS (circle one)
1.
CO2
ionic or
covalent
4.
PCl5
ionic or
covalent
2.
CaCO3
ionic or
covalent
5.
MgCl2
ionic or
covalent
3.
Fe2(SO4)3
ionic or
covalent
WRITING CHEMICAL FORMULAS FROM NAMES
Write the chemical formula for each chemical name.
1.
magnesium sulfate
_________________
2.
sulfur trioxide
_________________
3.
aluminum chloride
_________________
4.
carbon tetrachloride
_________________
5.
sodium carbonate
_________________
USE THE CRISSCROSS METHOD TO CREATE CHEMICAL FORMULAS
1.
Al +3 NO3 -1
_________________
2.
Mg +2 SO4 -2
_________________
3.
NH4 +1 CO 3 -2
_________________
4.
Al +3
5.
Li +1
CO 3 -2
PO4 -3
_________________
_________________
NAME IONIC COMPOUNDS
1.
BaCO3
_________________
2.
Na3PO4
_________________
3.
B2 (SO4)3
_________________
4.
(NH4)3PO4
_________________
5.
Fe2(CO3)3
_________________
STOCK VS CLASSICAL NAMES
Decide whether the chemical formula given is a stock or classical name.
Name
list stock or classical
1.
ferrous sulfate
_________________
_________________
2.
copper (II) sulfide
_________________
_________________
3.
plumbous sulfate
_________________
_________________
4.
iron (II) carbonate
_________________
_________________
5.
chromium (III) chloride
_________________
_________________
1.
HNO3
NAME ACIDS
_________________
2.
H3PO4
_________________
3.
H2 SO4
_________________
4.
H2 SO3
_________________
5.
H2CO3
_________________
BALANCING EQUATIONS
Balance the following equations AND determine the type of reaction.
Type of Reaction
1.
Al (s) + Cl2 (g) → AlCl3 (s)
_________________
2.
C4H10 (g) + O2 (g) → CO2 (g) + H2O (g)
_________________
3.
Al2O3 (s) + C (s) → Al (l) + CO2 (g)
_________________
4.
C2H5OH (l) + O2 → CO2 (g) + H2O (l)
_________________
5.
H2S (g) + SO2 (g) → S (s) + H2 (g) + O2 (g)
_________________
WRITE BALANCED EQUATIONS FROM WORD EQUATIONS
1.
calcium carbonate decomposes into calcium oxide and carbon dioxide gas
2.
phosphorous pentachloride mixed with water yields phosphoric acid and hydrochloric acid
3.
Sodium hydroxide added to phosphoric acid yields sodium phosphate and water
4.
aluminum metal mixed with ferric oxide yields aluminum oxide and iron
5.
ammonia added to sulfuric acid yields ammonium sulfate
MASS MASS PROBLEMS
1.
Tin (II) fluoride is used in some toothpastes. It is made by the reaction of tin with hydrogen
fluoride according to the following reaction:
Sn (s) + HF (g) → SnF2 (s) + H2 (g)
How many grams of SnF2 are produced from the reaction of 30.00g of HF with Sn?
LIMITING REACTANT PROBLEMS
1.
The black oxide of iron, Fe3O4 , occurs in nature as the mineral magnetite. This substance can
also be made in the laboratory by the reaction between red-hot iron and steam according to
the following equation:
Fe (s) + H2O (g) → Fe3O4 (s) + H2 (g)
a.
When 36.0g of H2O is mixed with 167g of Fe, which is the limiting reactant?
b.
What mass in grams of black iron oxide is produced?
DISTINGUISH BETWEEN EMPIRICAL AND MOLECULAR FORMULAS
1.
H2O
empirical or molecular
3.
C2H6
empirical or molecular
2.
H2O2 empirical or molecular
4.
As2O5
empirical or molecular
EMPIRICAL FORMULAS
1.
Quantitative analysis shows that a compound contains 32.38% sodium, 22.65% sulfur and
44.99% oxygen. Find the empirical formula of this compound.
2.
A compound is found to contain 63.52% iron and 36.48% sulfur. Find its empirical formula.
MOLECULAR FORMULAS
1.
A sample of a compound with a formula mass of 34.00 amu is found to consist of 0.44g H and
6.92g O. Find its molecular formula.
2.
If 4.04g of N combine with 11.46g of O to produce a compound with a formula mass of 108.0
amu, what is the molecular formula of this compound?
CALCULATING PERCENT YIELD
1.
Chlorobenzene, C6H5Cl, is used in the production of many important chemicals, such as
aspirin, dyes and disinfectants. One industrial method of preparing chlorobenzene is to react
benzene, C6H6 , with chlorine, which is represented by the following equation:
C6H6 (l) + Cl2 (g) → C6H5Cl (s) + HCl (g)
When 36.8g of C6H6 react with an excess of Cl2, the actual yield of C6H5Cl is 38.8g
What is the percent yield of C6H5Cl ?
GAS LAWS
1.
A scuba diver’s tank contains 0.29 kg of O2 compressed into a volume of 2.3L.
a) calculate the gas pressure inside the tank at 9 °C.
b) What volume would this oxygen occupy at 26 °C and 0.95 atm?
2.
What does STP stand for? _____________________________________________
What are the numeric values? __________________________________________
3.
A mixture containing 2.50 g each of CH4 (g), C2H4 (g), and C4H10 (g) is contained in a 2.00L
flask at a temperature of 15 °C.
a) Calculate the partial pressure of each of the gases in the mixture.
b) Calculate the total pressure of the mixture