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Alhussan Chemistry — Stage 9

Chapter 10: Structure, Bonding, and Properties

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Chapter 12: Chemical Reactions 3 and Rates

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Quiz

Chemistry 12.7 More about salts — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Which statement is NOT correct?
Hydrochloric acid HCl makes chlorides.
Sulfuric acid makes nitrates.
Copper oxide is a black powder.
Blue crystals form when copper sulfate solution cools.
2.
Which term matches this definition? “Makes nitrates.”
Nitric acid
Residue
Product
Sulfuric acid
3.
Sulfuric acid H2SO4 makes ____.
nitrates
chlorides
oxides
sulfates
4.
Warm the acid to speed up the ____.
reaction
drying
cooling
filtering
5.
Which term matches this definition? “Makes chlorides.”
Molten iron
Nickel nitrate
Haematite
Hydrochloric acid
6.
Salts made by the class from oxides. About how many times bigger is Copper sulfate than Zinc nitrate?
Dr Dabour Hub Academy - figure 1
1.2
2.5
3.8
5.0
7.
True or false? Metal oxides do not produce gas with acids.
True
False
8.
Which statement is correct?
Heating the acid stops the reaction.
Add acid in excess.
Copper oxide is blue.
Insoluble bases are added in excess.
9.
Salts in Lake Qinghai water (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
10.
Expected 7.5 g of copper sulfate crystals; got 5.6 g. Percentage yield?
747%
134%
75%
2%
11.
Which statement is NOT correct?
Nitric acid HNO3 makes nitrates.
Insoluble bases are added in excess.
Salts are dissolved in the water of Lake Qinghai.
Copper oxide is blue.
12.
1.4 g dissolved in 6 min. Mean rate?
0.23 g/min
4.29 g/min
7.40 g/min
8.40 g/min
13.
Expected 6.2 g of copper sulfate crystals; got 4.5 g. Percentage yield?
726%
138%
73%
2%
14.
Which term matches this definition? “Acid + base → salt + water.”
Saturated solution
Magnesium chloride
Sulfuric acid
Neutralisation
15.
Which statement is correct?
Heating the acid stops the reaction.
Copper sulfate solution is colourless.
Metal oxide + acid → salt + water.
Excess oxide stays dissolved.
16.
The acid determines the type of ____.
gas
salt
metal
oxide
17.
Salts in Lake Qinghai water (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
18.
Which term matches this definition? “Makes sulfates.”
Sulfuric acid
Cryolite
State symbol
Reactivity series
19.
1.8 g dissolved in 6 min. Mean rate?
10.80 g/min
7.80 g/min
0.30 g/min
3.33 g/min
20.
True or false? Copper oxide is a black powder.
True
False
21.
Which statement is NOT correct?
Add the oxide until no more dissolves.
Metal oxides are acids.
Copper oxide is a black powder.
Copper oxide + sulfuric acid → copper sulfate + water.
22.
Which statement is correct?
Sulfuric acid H2SO4 makes sulfates.
Copper oxide cannot make salts.
Nitric acid makes chlorides.
Sulfuric acid makes nitrates.
23.
Which acid makes chlorides?
Carbonic acid
Hydrochloric acid
Nitric acid
Sulfuric acid
24.
4.0 g of copper oxide added; 0.5 g left over. Mass reacted?
0.5 g
4.5 g
4.0 g
3.5 g
25.
True or false? Metal oxide + acid gives hydrogen.
True
False
26.
Iron oxide + hydrochloric acid → iron ____ + water.
oxide
chloride
sulfate
nitrate
27.
Salts in Lake Qinghai water (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
28.
True or false? The acid determines the type of salt.
True
False
29.
True or false? Heating the acid stops the reaction.
True
False
30.
Which is the correct definition of “Lake Qinghai”?
Rock containing enough metal compound to extract.
Salt lake in China.
Product of thermite used to weld rails.
Reusing metal to save ore and energy.
31.
True or false? Insoluble bases are added in excess.
True
False
32.
True or false? Zinc oxide + nitric acid → zinc nitrate + water.
True
False
33.
True or false? Add the oxide until no more dissolves.
True
False
34.
Expected 7.5 g of copper sulfate crystals; got 4.5 g. Percentage yield?
167%
60%
3%
600%
35.
Salts made by the class from oxides. About how many times bigger is Copper sulfate than Zinc nitrate?
Dr Dabour Hub Academy - figure 5
2.2
4.5
3.4
1.1
36.
pH as copper oxide is added to acid. At what value of "Oxide added (g)" is "pH" smallest?
Dr Dabour Hub Academy - figure 6
2.5
0
1.5
0.5
37.
Which statement is NOT correct?
Add acid in excess.
Excess oxide is removed by filtration.
Magnesium oxide + hydrochloric acid → magnesium chloride + water.
Sulfuric acid H2SO4 makes sulfates.
38.
Expected 6.2 g of copper sulfate crystals; got 5.0 g. Percentage yield?
81%
124%
806%
8%
39.
Excess oxide is removed by ____.
filtration
magnets
distillation
evaporation
40.
The final solution should be ____.
acidic
frozen
neutral
very alkaline
41.
Which term matches this definition? “Black base that makes copper salts.”
Bioleaching
Recycling
Copper oxide
Copper carbonate
42.
Salts in Lake Qinghai water (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 7
A
B
C
D
43.
Mass of copper oxide dissolving in warm acid. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 8
"Oxide dissolved (g)" rises to a peak at 8, then falls
"Oxide dissolved (g)" increases as "Time (min)" increases
"Oxide dissolved (g)" decreases as "Time (min)" increases
"Oxide dissolved (g)" stays the same
44.
3.0 g of copper oxide added; 0.8 g left over. Mass reacted?
3.8 g
0.8 g
3.0 g
2.2 g
45.
A salt costs $4 per 100 g. How much do 250 g cost?
62 dollars
254 dollars
1000 dollars
10 dollars
46.
Hydrochloric acid HCl makes ____.
sulfates
carbonates
nitrates
chlorides
47.
Which term matches this definition? “Metal oxide that does not dissolve but neutralises acid.”
Product
Haematite
Neutralisation
Insoluble base
48.
Mass of copper oxide dissolving in warm acid. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 9
A
B
C
D
49.
True or false? Add acid in excess.
True
False
50.
2.5 g of copper oxide added; 0.5 g left over. Mass reacted?
0.5 g
2.0 g
3.0 g
2.5 g
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Part of Chapter 12: Chemical Reactions 3 and Rates — see every lesson and quiz in this unit.
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