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

Measures of Concentration: Molarity Answers

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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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Which substances are most likely acids? Check all that apply.

A
CH4
B
HI
C
NH3
D
HNO3
E
NaCl
3

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.
4

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

A
Option
B
Option
C
Option
D
Option
5

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
6

Choose the products that complete the reaction. The chemical equation may not be balanced.HC2H3O2 + Ca(OH)2 ?

Question illustration
A
Ca(C2H3O2)2 + H2O
B
Ca(C2H3O2)2 + CO2+ H2O
C
Ca(C2H3O2)2 + H2
7

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
8

Identify the base in this acid-base reaction:

Question illustration
A
HC2H3O2
B
Mg(OH)2
C
Mg(C2H3O2)2
D
H2O
9

Identify the base in this acid-base reaction:

Question illustration
A
NaOH
B
HCl
C
NaCl
D
H2O
10

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.
11

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)
12

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
13

Which reasons explain why acids are added to foods? Check all that apply.

A
to make the foods more corrosive
B
to reduce spoilage
C
to add zest or sour taste to food
D
to make the food taste bitter

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