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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
solution
D
suspension
2) Your solution contains 50 g of water and 2 g of salt. Which is the solute?
A
none of the above
B
the salt and water
C
salt
D
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
separate from
B
join with
C
move closer to
D
none of the above
5) Ionic compounds in water conduct electric current.
A
none of the above
B
false
C
true
D
sometimes true and sometimes false
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
Both are equally concentrated
B
You can't tell with the information given.
C
Solution A
D
Solution B
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
syrup
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
solution
B
concentration
C
saturated
D
solubility
10) Some solutes and solvents just aren't compatible.
A
false
B
true
C
none of the above
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
wood
D
gold
13) Citrus fruits are often sour because they contain
A
acids
B
alkalines
C
none of the above
D
bases
14) Many bases are made of positive ions combined with
A
hydrogen ions
B
homologous ions
C
positive ions
D
hydroxide ions
15) A substance registers as 4 on the pH scale. It is
A
neutral
B
a base
C
neither an acid nor a base
D
an acid
16) After neutralization, the mixture will
A
be the same level of acid or base as the reactants
B
not be as acidic or basic as the reactants
C
become a very strong base.
D
be more acidic or basic as the reactants
17) In a neutralization reaction, an acid reacts with a base to produce a(n) ___ and water.
A
base
B
acid
C
salt
D
sugar
18) The universal solvent is
A
water
B
hydrogen
C
air
D
oxygen
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
concentrated solution
B
none of the above
C
dilute solution
D
saturated solution
*select an answer for all questions
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