Mrs. Gebhard
Chemistry (422) Midterm Review
STUDY!!!!
**Refer to your note packets/books for help with this material
CH1 Chemical Exploration:
1.
a. Develop a Hypothesis for the experiment above.
b. Determine the Independent (Manipulated) Variable:
c. Determine the Dependent Variable:
d. Determine the Experimental Control:
2. What is Chemistry?
CH 2: Matter and Energy:
1. Name something that is not matter:
2. Define:
Extensive Property:
Intensive Property:
3. Pure Substance vs. Mixtures: What is the main difference?
Name________________________
Mrs. Gebhard
Chemistry (422) Midterm Review
Name________________________
4. Classify each of the following as an element (E), compound (C), solution (S), or heterogeneous mixture
(HET)
Copper _____________________
Brass _____________________
Maple Syrup _____________________
Granite Rock _____________________
Italian Dressing _____________________
Carbon Dioxide _____________________
5. States of Matter
Solid
__________________ Shape
__________________ Volume
Liquid
__________________ Shape
__________________ Volume
Gas
__________________ Shape
__________________ Volume
6. Chemical vs. Physical Properties and Changes:
a. Describe the difference between physical properties and chemical properties. Give an example
of each.
b. Describe the difference between physical change and chemical change. Give an example of
each.
7. Identify each of the following changes as chemical (CC) or physical (PC).
_________________: grinding a crystal into powder
_________________: rusting of iron
_________________: digesting an apple
_________________: mixing oil and water
_________________: bleaching a piece of cloth
_________________: melting iron
_________________: tarnishing of a silver necklace
8. Identify whether the property is chemical(CP) or physical (PP)
_________________: the odor of hydrogen cyanide is sweet
_________________: sodium will react with water in air
_________________: the volume of a typical milk jug is one gallon
_________________: gold is an excellent conductor of electricity
_________________: propane is extremely flammable
_________________: talc is finely powdered
_________________: the density of lead is 13.5 g/mL
_________________: oxygen is needed for objects to burn
_________________: uranium is radioactive
CH3: Measurement and Problem Solving:
1. Significant Figures
6.751 g
30.07 g
0.156 kg
0.106 cm
2500 mL
0.0230 L
28.0 m
0.0067 g
54.052 cm3
0.1209 m
43.09 cm
50,000 mL
Mrs. Gebhard
Chemistry (422) Midterm Review
Name________________________
2. Addition/Subtraction Rules:
8.76m + 6.0m =
2222km + 111km =
3. Multiplying/Dividing Rules:
2.2mm * 5.00mm =
6.42cm/2.1cm =
4. Scientific Notation
A. 0.00003
B. 56,000,000
C. 650
D. 0.00007
E. 43,500
F. 0.00568
G. 5.63x103
H. 3.71x104
I. 8.5x106
J. 6.4x10-2
K. 5.63x10-5
L. 9.3x10-1
5. Accuracy and Precision
a. Definition of accuracy:
b. Definition of precision:
6. Units: Convert between Celsius and Kelvin temperatures
34.1˚C
45˚C
120˚C
653K
320K
283K
7. Mass vs. Weight: What is the difference?
Mrs. Gebhard
Chemistry (422) Midterm Review
Name________________________
8. Factor Label Problems
1 yard = 3 feet
1 gallon = 3.97 liters
1 foot = 12 inches
1 mile = 5280 feet
1 inch = 2.54 cm
100 cm = 1 meter
1 mile = 1.6 km
1 liter = 1000 cm3
Given metric prefixes (not equalities)
“milli (m) 1000 times smaller than the unit it precedes” → 1000mm = 1m
Use the above conversion factors to solve the following problems.
A) Calculate the number of centimeters in 4.5 yards?
B) Convert 2.1 kilometers into inches.
C) The density of lead (Pb) is 11.34 g/cm3. Find the density in kg/L.
9. Density
A) Define: Mass:______________________________________________________
Measuring Instrument?___________________ Units? _____________________
B) Define: Volume:____________________________________________________
Measuring Instrument? ___________________ Units? _____________________
OBJECT
MEASUREMENT
METHOD
MEASURING
INSTRUMENT
Liquid
Block of Wood
Irregular Shaped Object
10. Density Equation:
11. Calculate the volume of 80.0g of ether if the density of ether is 0.70 g/mL. Will ether sink or float in
water (1.00g/mL)?
Mrs. Gebhard
Chemistry (422) Midterm Review
Name________________________
CH 4: Atomic Theory
**Use your Atomic Theory Study Guide for information about the scientists, experiments and atom models
related to atomic theory.
Chart Terms (like the tables, but they will be multiple choice)
PARTICLE
CHARGE
LOCATION
MASS
Proton
Electron
Neutron
Substance
Symbol
Atomic
Number
Mass
Number
Number of
Protons
Magnesium
Krypton
Calcium
Silver
MIDTERM INQUIRY: Percent Sugar Lab
 % Sugar Standard Calculations
 Density of Trials
 Average Density
 Density vs. % Sugar Graph (Calibration Curve)
 Use the calibration curve to find the % Sugar of unknown solutions
 Write a hypothesis
 Independent variable
 Dependent Variable
 What was the control?
 Why multiple trials?
 Purpose of calibration curve
Number of
Electrons
Number of
Neutrons