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WorksheetsChemistry Semester 2 Final Exam Review
Total questions: 57
Worksheet time: 3hrs 32mins
Name
Class
Date
1.
What is a substance that is dissolved in another substance?
a)
solution
b)
solute
c)
solvent
d)
compound
2.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
3.
The concentration of a mixture can be increased in which of the following ways?
a)
Heating the mixture
b)
Adding more water “solvent”
c)
Adding more powder “solute”
d)
Stirring the mixture
4.
A solution that is considered dilute would be....
a)
Dark in color
b)
Have a strong scent
c)
Have a large amount of solute
d)
Have a small amount of solute
5.
Kool-Aid - Powder, sugar, and water
Identify the solvent
Identify the solvent
a)
water
b)
powder
c)
sugar
d)
powder and sugar
6.
Lemonade - Water, lemon juice, and sugar
Identify the solute
Identify the solute
a)
water
b)
lemon juice
c)
sugar and lemon juice
7.
When Koolaid mix is light colored and tastes watery it is a _______ solution.
a)
saturated
b)
diluted
8.
When a Koolaid mix in water is dark in color and very sweet it is a __________ solution.
a)
concentrated
b)
Diluted
9.
At 40 oC and 50 g/l the solution of KCl would be:
a)
saturated
b)
supersaturated
c)
unsaturated
10.
At 40 oC and 50 g/l the solution of KCl in 200 g of water would be:
a)
saturated
b)
supersaturated
c)
unsaturated
11.
If the saturated solution of K2Cr2O7 was cooled from 80 to 60 oC, how much solute would fall out?
a)
20 g
b)
40 g
c)
15 g
d)
30 g
12.
A way to increase the amount of sugar dissolved in tea is to
a)
crush and cool
b)
crush and leave alone
c)
crush and heat
13.
Calculate the molarity of 25.0 grams of KBr dissolved in 0.75 L (hint: find moles convert to grams)
a)
0.280 M
b)
0.210 M
c)
33.3 M
14.
How many moles of solution will result when 15.0 L of H2SO4 is used to make a 0.20 M solution?
a)
75 moles
b)
7 moles
c)
3 moles
d)
0.013 moles
15.
Convert 3000 mL into L.
a)
3000 L
b)
300 L
c)
30 L
d)
3 L
16.
What is the molarity of a solution containing 8.0 moles of solute in 500 mL of solution?
a)
0.016 M
b)
16 M
c)
62.5 M
d)
0.063 M
17.
What is the molar mass of C6H12O6?
a)
180.18
b)
180.12
c)
180.24
d)
180.06
18.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
19.
N2 + 3H2 → 2NH3
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
20.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)
12.00 moles of NaClO3 will produce how many grams of O2?
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
21.
Balance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
a)
1,2,2,2
b)
1,2,1,1
c)
2,1,1,1
d)
2,1,2,1
22.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
23.
What is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6 H2O --> 4 H3PO4
a)
6:4
b)
4:6
c)
1:3
d)
3:1
24.
How many grams are in 7.8 moles of NaCl?
a)
476grams
b)
460 grams
c)
452 grams
d)
462 grams
25.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
26.
SiO2 + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?
a)
96 g
b)
0.67 g
c)
2.67 g
d)
48 g
27.
Cl2 + 2 KBr → Br2 + 2 KCl
How many grams of potassium chloride can be produced from 356 g of potassium bromide?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
28.
What is a Excess Reagent?
a)
amount you end with
b)
what you run out of first
c)
what you have left over
d)
what you start with
29.
Fe (s) + S (l) --> FeS (s)
In the experiment above, 7.62 g of Fe are allowed to react with excess S.
How much FeS is formed?
a)
14.8 g
b)
12.2 g
c)
13.7 g
d)
19.9 g
30.
Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker
The substance in the beaker
a)
is a base.
b)
has a neutral pH.
c)
is an acid.
d)
does not have a pH.
31.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
32.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
33.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
34.
Many cleaning solutions are bases. Which of the following is a property of most bases?
a)
feels slippery
b)
white color
c)
can only be liquid
d)
tastes sour
35.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
36.
Acid + base --> ?
a)
salt + hydrogen gas + water
b)
salt + carbon dioxide + water
c)
salt + water
d)
salt only
37.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
38.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
39.
What is the pH of a .0235 M HCl solution?
a)
.0235
b)
1.629
c)
11.6
d)
2.35
40.
What is the pOH of a .0235 M HCl?
a)
12.37
b)
1.69
c)
1.234
d)
15.67
41.
What is the pOH of .05 M KOH solution?
a)
1.3
b)
4.21
c)
9.79
d)
5.7
42.
If the H+ concentration is 0.00005 M, is the substance an acid , base or neutral?
a)
base
b)
acid
c)
neutral
43.
A substance has an [H+] concentration of .000567. Is the solution acidic, basic or neutral?
a)
acidic
b)
basic
c)
neutral
44.
What is the pH of a 1 x 10-8 M solution of HNO3?
a)
8
b)
6
c)
7
d)
7.5
45.
What is the pOH of a 1 x 10-8 M solution of HNO3?
a)
8
b)
6
c)
7
d)
7.5
46.
If the solution of HNO3 has a pH of 8 and a pOH of 6. Is it an acid, base, or neutral?
a)
acid
b)
base
c)
neutral
47.
What is the [OH-] if the [H+] is
1.0 x 10-3M?
1.0 x 10-3M?
a)
1.0 x 10-3 M
b)
6.02 x 10-23 M
c)
1.0 x 10-14 M
d)
1.0 x 10-11 M
48.
What is the pOH of a solution where the [OH-] is 7.3 x 10-2 M?
a)
-1.14
b)
2.0
c)
1.14
d)
7.3
49.
What is the [H+] if the pH is 4.0?
a)
1.0 x 10-10 M
b)
1.0 x 10-4 M
c)
1.0 x 10-14 M
d)
1.0 x 10-7 M
50.
What is the pOH of a solution that has a pH of 2?
a)
10
b)
12
c)
14
d)
1
51.
Rate of chemical reaction means
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
52.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
53.
Increase in temperature of the reactants can do one of the following
a)
Slow collision frequency
b)
Allow less effective collision between the particles
c)
Neutralise the reaction
d)
increase collision between the particles thus increasing the rate.
54.
You add more bodies into a "mosh pit" to hope for more collisions. You have increased-
a)
temperature
b)
concentration
c)
pressure
d)
catalyst
55.
Which of the following increase the reaction rate?
a)
less surface area
b)
lower temperature
c)
an inhibitor
d)
increased concentration
56.
Why does a higher temperature increase the rate of a reaction?
a)
it increases both the frequency and energy of particle collisions
b)
it only increases the frequency of particle collisions
c)
it only increases the energy of particle collisions
d)
it reduces the activation energy of the reaction
57.
To slow down a chemical reaction you will do one of the following:
a)
Place the reactants in hot water
b)
Place the products in ice bath
c)
Place the reactants in a ice bath
d)
Keep stirring the reactants with a stirring rod
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