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Acids And Bases, 8th Grade
Test Description: Acids and Bases
Instructions: Answer all questions to get your test result.
1) A mixture that contains a solvent and at least one solute and has the same properties throughout
A
mixture
B
colloid
C
suspension
D
solution
2) Your solution contains 50 g of water and 2 g of salt. Which is the solute?
A
none of the above
B
salt
C
water
D
the salt and water
3) Which of the following can be solvents?
A
all of the above
B
gases
C
liquids
D
solids
4) A solution forms when particles of the solute ___ each other and become surrounded by solvent particles.
A
separate from
B
none of the above
C
join with
D
move closer to
5) Ionic compounds in water conduct electric current.
A
sometimes true and sometimes false
B
true
C
false
D
none of the above
6) Solutes raise the ___ of a solution above that of the solvent.
A
freezing point
B
boiling poing
C
sublimation point
D
melting point
7) Solution A has 20 g solvent and 1 g solute. Solution B has 20 g solvent and 10 g solute. Which one is more concentrated?
A
You can't tell with the information given.
B
Both are equally concentrated
C
Solution B
D
Solution A
8) 40 gallons of sap is boiled to remove most of the water and become 1 gallon of maple syrup. Which is the concentrated solution?
A
syrup
B
they are equally concentrated
C
sap
D
you can't tell with the info given
9) A measure of how much solute can dissolve in a solvent at a given temperature
A
solubility
B
saturated
C
concentration
D
solution
10) Some solutes and solvents just aren't compatible.
A
false
B
true
C
sometimes true and sometimes false
D
none of the above
11) Metals seem to disappear in acids because acids are ___, or wear away other metals.
A
explosive
B
erosive
C
conglomerate
D
corrosive
12) Carbonates are found in things like
A
wood
B
gold
C
bronze
D
seashells
13) Citrus fruits are often sour because they contain
A
none of the above
B
acids
C
alkalines
D
bases
14) Many bases are made of positive ions combined with
A
homologous ions
B
hydrogen ions
C
positive ions
D
hydroxide ions
15) A substance registers as 4 on the pH scale. It is
A
a base
B
neither an acid nor a base
C
neutral
D
an acid
16) After neutralization, the mixture will
A
not be as acidic or basic as the reactants
B
be more acidic or basic as the reactants
C
be the same level of acid or base as the reactants
D
become a very strong base.
17) In a neutralization reaction, an acid reacts with a base to produce a(n) ___ and water.
A
sugar
B
salt
C
acid
D
base
18) The universal solvent is
A
air
B
water
C
oxygen
D
hydrogen
19) The pH scale expresses the concentration of ___ ions in a solution
A
hydroxide
B
oxygen
C
carbon dioxide
D
hydrogen
20) If you've added so much solute that no more dissolves, you have a
A
saturated solution
B
none of the above
C
dilute solution
D
concentrated solution
*select an answer for all questions
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