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Ocean Acidification, Acids/Bases, and pH, and Moles

Total questions: 21

Worksheet time: 12mins

Name
Class
Date
1.

Which concentration of sweet tea would you expect to taste the sweetest?

a)

1 Molar

b)

3 Molar

c)

3.1 Molar

d)

2.5 Molar

2.

True or False? The higher the concentration of a solution the less solutes (ingredients) it has in it.

a)
True
b)
False
3.

What is the molarity of 1 mole of Ba+ mixed in 2 L of water

a)
1 M
b)
2 M
c)
.5 M
d)
.25 M
4.

What is Avogadro's Number (the number for a mole)? 

a)

6 x 1023

b)

-6 x 1023

c)

6 x 1022

d)

6,000,000,000,000

5.
The pH scale is a range from:
a)
1-7
b)

1-14

c)
1-5
d)
1-20
6.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
7.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
8.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
9.
Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.
a)
lower
b)
higher
c)
the same
d)
none of the above
10.

In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about there relationship?

a)

Both of the solution are Bases

b)

Both of the solution are Acids

c)

The Baking soda is an acid and the Bleach is a base

d)

The baking soda is a base and the Bleach is an Acid.

11.
On the pH scale higher numbers indicate
a)
acids
b)
bases
12.

According to the pH range which substance is less acidic than cabbage juice

a)
Hydrochloric acid
b)

Lemon Juice

c)

Milk

13.

Which of the following is the strongest acid according to pH?

a)

1

b)

5

c)

3

d)

8

14.

Which of the following is the strongest base according to pH?

a)

4

b)

14

c)

7

d)

15

15.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
16.
Examine the results (blue) of the pH paper shown in the picture.  What type of substance was tested?
a)
an acid
b)
a base
c)
a neutral substance
d)
none of the above
17.

Which substance listed below is the most acidic ( strongest acid)

a)

coffee= pH of 5

b)

orange juice = pH of 3

c)

ammonia = pH of 11

d)

bleach = pH of 13

18.

What is the SI unit that refers to the number of particles contained in a substance?

a)

Mole

b)

Gram

c)

Cation

d)

Anion

19.

Carbon dioxide (CO2) enters the ocean from the ______________________________.

a)

atmosphere

b)

photosynthesis of aquatic plants and algae

c)

melting of sea ice

d)

freezing of seawater

20.

Ocean acidification occurs when too much _______________________________ enters the ocean from the atmosphere.

a)

calcium carbonate

b)

carbon dioxide

c)

sulfur dioxide

d)

nitrogen gas

21.
As the ocean becomes more acidic, the pH of the water
a)
increases
b)
decreases

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