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SEPUP Water Review
Test Description: This reviews concepts covered during our water unit.
Instructions: Answer all questions to get your test result.
1) Water is called the universal solvent because it . . .
A
can be found throughout the universe.
B
dissolves many different substances.
C
dissolves both acids and bases.
D
supports living species.
2) Which of the following is not a biological contaminant?
A
Oils and Cleaners
B
Viruses
C
Bacteria
D
Parasites
3) Which is the most diluted solution?
A
1ooml of water with 10 ppm of table salt
B
1ooml of water with 100 ppm of table salt
C
1ooml of water with 1 ppm of table salt
D
1ooml of water with 10,000 ppm of table salt
4) True or False, a contaminant remains in a solution even when it is diluted so much that it can not be detected?
A
False
B
True
5) What is the best way to remove a dissolved solid pollutant from a water sample?
A
dilution followed by neutralization
B
precipitation followed by filtration
C
neutralization followed by precipitation
D
neutralization followed by filtration
6) If a solution turns universal indicator blue and can be neutralized by adding an acid, is it an acid or a base?
A
Both
B
Base
C
Acid
D
Neither
7) If a solution can be neutralized by a base and turns universal indicator red, is it an acid or a base?
A
Neither
B
Both
C
Base
D
Acid
8) Any substance that increases the concentration of H+ ions when it dissolves in water is a(n)
A
acid
B
neutral solution
C
salt solution
D
base
9) A bond formed between a positive ion and a negative ion is called ________________.
A
A neutral bond
B
an ionic bond
C
a super bond
D
a covalent bond
10) Any substance that increases the concentration of OH- ions when it dissolves in water is __________.
A
a neutral solution
B
a salt solution
C
a base
D
an acid
11) A bond that forms when two atoms share electrons is called ______________.
A
an ionic bond
B
a neutral bond
C
a covalent bond
D
a super bond
12) Which of the following is not evidence of a chemical property?
A
A different reaction to universal indicator
B
a color change
C
a phase change (between solid, liquid, or gas)
D
A new substance is formed
13) When is a solution neutral?
A
When the pH is 7
B
When an acid is added to a base
C
When universal indicator is red or blue
D
When a base is added to an acid
14) What is a precipitate?
A
Rain
B
A solute that dissolves into water
C
A solid that forms from two solutes
D
A solvent that can dissolve a salt
*select an answer for all questions
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