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Final Exam 3
Test Description: Final
Instructions: Answer all questions to get your test result.
1) What is Henry’s Law?
A
The direct relationship between the pressure of a gas and its temperature in Kelvin
B
When volume and temperature are constant, gas pressure increases as the number of molecules increases.
C
The solubility of a gas in a liquid is directly proportional to the pressure of that gas above the surface of the solution.
D
The inverse relationship between volume and the pressure of a gas.
2) What is an example of Henry’s Law?
A
spray paint
B
bottled water
C
filling up a tire
D
carbonated beverage (soda)
3) Liquids and solids exhibit practically no change in solubility with changes in
A
moles
B
pressure
C
temperature
D
volume
4) What are the three types of solutions for a solubility curve?
A
not full, full, really full
B
unconcentrated, concentrated, superconcentrated
C
unsaturated, saturated, supersaturated
D
emulsions, colloidals, solutions
5) What exactly does a solubility curve show?
A
How concentrated a solution is
B
The amount of H2O needed to dissolve something
C
How much solute has dissolved at 30oC
D
The maximum amount of a substance that can be dissolved in 100g H20 at a given temperature
6) Concentration is defined as
A
A substance that dissolves in water to give a solution that conducts electric current
B
A substance that dissolves in water to give a solution that does not conduct an electric current
C
How much solute is dissolved in a given amount of solution
D
How much solution is dissolved in a given amount of solute
7) The concentration of a solution is its
A
molar volume
B
volume
C
molarity
D
molar mass
8) How many moles of CuSO4 ⋅ 5H2O are in 0.8 L of a 0.6 M solution?
A
0.48 moles
B
1.3 moles
C
1.4 moles
D
0.20 moles
9) Which of the following is NOT a property of a base?
A
feel slippery
B
have a bitter taste
C
have a sour taste
D
conduct electric current
10) Calculate the pH of a solution with an H3O+ of 7.5 x 10-9 M
A
9.00
B
8.12
C
5.88
D
7.50
11) When does a precipitation reaction occur?
A
When you lose a bunch of electrons
B
When two metals swap non-metals
C
When you drop something into a substance
D
When you take a solute out of a solvent
12) Water makes both a hydrogen ion and a hydroxide ion. It is _____.
A
An acid
B
A base
C
Neutral
13) Which of the following is NOT a property of an acid?
A
some react with active metals
B
have a sour taste
C
do NOT conduct electricity
D
react with bases to produce salt and water
14) When a substance gives away an electron, that substance is ___________________.
A
Reduced
B
Initiated
C
Precipitate
D
Oxidized
15) When is the helpful acronym we use for remembering this?
A
ORE-ELG
B
LEG-REO
C
LEO-GER
D
GEO-LER
16) What is a precipitate?
A
An insoluble solid formed during a double replacement reaction
B
Stuff you put in a solute
C
Anything that helps a reaction
D
A gas
17) When an atom or molecule loses an electron this is called?
A
losition
B
transition
C
reduction
D
oxidation
18) Which of the following is not a type of energy?
A
kinetic
B
potential
C
acidic
D
chemical
19) What is chemical energy?
A
energy from fire and explosions
B
potential energy stored in chemical bonds
C
energy used when turning on a metal burner
D
energy used by a roller coaster going down hill
20) Which of the following is not a way energy is transferred?
A
convection
B
radiation
C
conduction
D
concentration
*select an answer for all questions
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