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