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example exam for 4th exam

Total questions: 28

Worksheet time: 57mins

Name
Class
Date
1.

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

a)

0.8 M

b)

1.5M

c)

3.0M

d)

6.0M

2.
Which of the following substances is a heterogeneous substance?
a)
baby oil
b)
rocky road ice cream
c)
salt water
d)
milk
3.
Which of the following substances is a homogeneous solution?
a)
chocolate chip cookie
b)
italian dressing
c)
apple juice
d)
orange juice
4.

Which of the following types of solutions has more room to dissolve solute?

a)

supersaturated

b)

saturated

c)

unsaturated

5.
How many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide? 
a)
2
b)
3
c)
4
d)
6.
How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?
a)
1074 mol
b)
0.069 mol
c)
1.07 mol
d)
62.7 mol
7.

What happens to acids when they react to metals?

a)

Produce Oxygen gas

b)

Helium Gas

c)

Hydrogen gas

8.

Which are more corrosive with metals?

a)

Acids

b)

Bases

c)

Both are corrosive

9.

Which are slippery when touched?

a)

Acids

b)

Bases

10.

What would the expected pH of a cola be?

a)

2.5 - 3.5

b)

7

c)

8-9

11.

Which of the following are properties of acids?

a)

They conduct electricity when dissolved in water

b)

They taste sour

c)

They react with metals to produce hydrogen gas

d)

All of the answer choices are correct

12.

If the substance is neutral, what would the pH be?

a)

3

b)

5

c)

7

d)

9

e)

11

13.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
14.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
15.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
16.

What is the molarity of a solution containing 4 moles of KCl in 2.5 L of solution?

a)

1.6 M

b)

0.63 M

c)

10 M

d)

2.6 M

17.

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt


Solution 2:

500 mL of water

90 g of salt

a)

Solution 1

b)

Solution 2

c)

They have the same concentration

d)

I have no idea

18.

write defination of Molarity

4 lines
19.

write properties of bases

4 lines
20.

Acids release what into a solution?

a)

H+ ions

b)

Hydroxide Ions (OH-)

c)

water

d)

salt

21.

HI + H2O --> H3O+ + I-


Is HI and acid or base?

a)

acid

b)

base

c)

no way to tell

22.

NaOH + H20 --> Na+ + OH-


Is NaOH and acid or base?

a)

acid

b)

base

c)

no way to tell

23.

Which of the following substances are considered ACIDIC? (Select all that apply)

a)

orange juice

b)

soap

c)

sulfuric acid

d)

gastric acid

24.

Which of the following substances are considered BASIC? (Select all that apply)

a)

bleach

b)

sea water

c)

baking soda

d)

lemon juice

25.
An Arrhenius acid must contain ___ and ionize to produce ___.
a)
hydrogen ions; a solution with a pH greater than 7
b)
hydrogen; hydrogen ions
c)
hydroxide ion; hydroxide ions
d)
hydroxide ion; a solution with a pH greater than 7
26.
According to Brønsted-Lowry theory of acids and bases, a base is ___.
a)
a proton acceptor
b)
a proton donor
c)
a compound that dissolves in water to produce OH-
d)
an electron donor
27.

The conjugate base of H2SO4 is ___.

a)

H2SO3

b)

HSO4-

c)

H3SO4+

d)

SO4-2

28.

In the reaction represented by H2C2O4+CH3NH2    HC2O4+CH3NH3+,H_2C_2O_4+CH_3NH_2\ \ \rightarrow\ \ HC_2O_4^-+CH_3NH_3^+,   Which of these is a conjugate acid to the base CH3NH2CH_3NH_2 ?

a)

None

b)

H2C2O4H_2C_2O_4  

c)

CH2NH3+CH_2NH_3^+  

d)

HC2O4HC_2O_4^-