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Water Unit Test
Test Description: 8th Grade unit test
Instructions: Answer all questions to get your test result.
1) Some salt vegetables, and spices are added to some hot water. The salt disappears into the water, the vegetables sink to the bottom and the spices float. Which of the following is the solute in this mixture?
A
Spices
B
Vegetables
C
Salt
D
Water
2) Water is called the universal solvent because it
A
Dissolves many other substances
B
Is found throughout the universe
C
Is necessary for life
D
Dissolves both salt and sugar
3) Water that is traveling through the water cycle can pick up contaminants
A
When traveling as surface water in a river
B
All of the above
C
When traveling underground as groundwater
D
When falling through the air as precipitation
4) A cleaning solution of ammonia in water in water turns universal indicator blue. The ammonia solution can be neutralized by adding an acid. Based on this, you can conclude that ammonia is
A
Neutral
B
An acid
C
A salt
D
A base
5) You measure the pH of some water and it is neutral. This tells you that
A
There is no salt in the water
B
The water is not polluted
C
There is no acid in the water
D
The water is safe to drink
6) Which of the following is a true statement about acids?
A
They turn universal indicator solution blue
B
Examples include vinegar and lemon juice
C
They turn pH paper green
D
They have a pH of 8 or higher
7) Which of the following is a true statement about bases?
A
Examples include vinegar and lemon juice
B
They taste sour
C
They turn universal indicator solution blue
D
They turn pH paper green
8) Equal amounts of acid and base are added to a clean beaker. Which of the following is true? Choose the best answer
A
The solution is the same as pure water
B
The solution might be acidic or basic if unequal to start
C
The solution must be neutral
D
The pH must be 7
9) Any substance that increases the concentration of H+ ions when it dissolves in water is a (an)
A
neutral Solution
B
Salt Solution
C
Acid
D
Base
10) Any substance that increases the concentration of OH- ions when it dissolves in water is a (an)
A
Base
B
Acid
C
Salt Solution
D
Neutral Solution
*select an answer for all questions
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