Answers26-27 CFISD TX-Chemistry A CRMeasures of Concentration: Molarity

Measures of Concentration: Molarity Answers

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1
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HBr + KOH KBr + H2OIn this reaction, the acid is

Question illustration
A
HBr.
B
KOH.
C
KBr.
D
H2O.
2
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Calcite (the main mineral in limestone) is made of calcium carbonate (CaCO3). Dolomite, a related mineral, is made of magnesium carbonate (MgCO3). What happens if a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite?

A
There is no way to predict what will happen.
B
Fizzing will occur because carbon dioxide is produced.
C
No reaction will occur because dolomite contains no calcium.
3

Select the chemical equation that most likely represents the reaction between the vinegar and the dolomite.

A
Option
B
Option
C
Option
D
Option
4

Choose the products that complete the reaction. The chemical equations may not be balanced.HCl + NaOH ?

Question illustration
A
NaCl + H2O
B
NaCl + CO2 + H2O
C
NaCl + H2
5

Choose the products that complete the reaction. The chemical equation may not be balanced.NaHCO3 + HC2H3O2 ?

Question illustration
A
NaC2H3O2 + H2O
B
NaC2H3O2 + CO2 + H2O
C
NaC2H3O2 + H2
6

A piece of lithium metal is added to a beaker that contains water and phenolphthalein. Using what you know about the properties of bases, choose the best explanation for what you observe.

A
The phenolphthalein is turning pink because an acid is forming.
B
The phenolphthalein is turning pink because a base is forming.
C
The phenolphthalein is turning pink because the reaction is at equilibrium.
7

Select the most likely product for this reaction:

Question illustration
A
CO2(g) + H2O(l)
B
LiNO3(aq) + H2O(l)
C
LiNO3(aq) + H2(g) + O2(g)
8

Select the most likely product for this reaction:

Question illustration
A
AgOH(s) + NaNO3(aq)
B
Ag2O(s) + HNO3(aq)
C
Ag(s) + H2(g) + O2(g)
9

Cola contains phosphoric acid and carbonic acid. Which is the most likely reason that cola also contains a large amount of sugar or other sweetener?

A
to improve the fizziness
B
to counteract the sourness of the acids
C
to provide color to the drink
10

Which aisles of the grocery store would be likely to include examples of acids and bases? Choose all that apply.

A
frozen foods
B
plastic cups and bags
C
cleaning products
D
medical and health
E
juices
F
kitchen utensils and pots and pans
G
cooking and baking

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