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Alhussan Chemistry — Stage 9

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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.
4.0 g of copper oxide added; 1.0 g left over. Mass reacted?
1.0 g
3.0 g
4.0 g
5.0 g
2.
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
3.
Salts in Lake Qinghai water (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
4.
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.
5.
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.
6.
Salts made by the class from oxides. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
7.
Salts made by the class from oxides. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
8.
True or false? Copper oxide is blue.
True
False
9.
pH as copper oxide is added to acid. At what value of "Oxide added (g)" is "pH" smallest?
Dr Dabour Hub Academy - figure 5
2.5
0
1.5
0.5
10.
Which statement is NOT correct?
Excess oxide is removed by filtration.
Copper sulfate solution is colourless.
Hydrochloric acid HCl makes chlorides.
Zinc oxide + nitric acid → zinc nitrate + water.
11.
Salts made by the class from oxides. What is the total of all the values?
Dr Dabour Hub Academy - figure 6
21
10
18
24
12.
Which statement is NOT correct?
Iron oxide + hydrochloric acid → iron chloride + water.
Copper oxide + sulfuric acid → copper sulfate + water.
Heating the acid stops the reaction.
The acid determines the type of salt.
13.
Which statement is correct?
Hydrochloric acid HCl makes chlorides.
Copper oxide cannot make salts.
Heating the acid stops the reaction.
Metal oxides are acids.
14.
Which term matches this definition? “Makes nitrates.”
Nitric acid
Residue
Product
Sulfuric acid
15.
Which acid and base make nickel chloride?
Hydrochloric acid and nickel carbonate
Sulfuric acid and nickel
Nitric acid and nickel oxide
Hydrochloric acid and zinc
16.
Salts made by the class from oxides. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 7
A
B
C
D
17.
Which is the correct definition of “Insoluble base”?
Metal oxide that does not dissolve but neutralises acid.
Smallest particle of an element.
More reactive metal replaces a less reactive one in a compound.
Small number after a symbol.
18.
Which is the correct definition of “Sulfuric acid”?
Dissolved in water, (aq).
Makes sulfates.
Atoms joining differently.
Substance formed.
19.
Metal oxides do ____ produce gas with acids.
explosively
quickly
always
not
20.
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
21.
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
22.
Which term matches this definition? “A reactant such as a metal oxide that neutralises an acid.”
Indicator
Base
Catalyst
Solvent
23.
Metal oxides are ____.
salts
alkali metals
acids
bases
24.
Which is the correct definition of “Nitric acid”?
Green compound in malachite.
Metal oxide that does not dissolve but neutralises acid.
Makes nitrates.
Atoms joining differently.
25.
True or false? Add the oxide until no more dissolves.
True
False
26.
Insoluble bases are added in ____.
excess
equal amounts
small drops
none
27.
Salts in Lake Qinghai water (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
28.
Sulfuric acid H2SO4 makes ____.
nitrates
chlorides
oxides
sulfates
29.
Salts made by the class from oxides. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 9
A
B
C
D
30.
Excess oxide is removed by ____.
filtration
magnets
distillation
evaporation
31.
True or false? Magnesium oxide + hydrochloric acid → magnesium chloride + water.
True
False
32.
True or false? The final solution should be neutral.
True
False
33.
Which statement is correct?
Nitric acid makes chlorides.
Zinc oxide + nitric acid → zinc nitrate + water.
Metal oxide + acid gives hydrogen.
Heating the acid stops the reaction.
34.
1.8 g dissolved in 8 min. Mean rate?
4.44 g/min
0.23 g/min
9.80 g/min
14.40 g/min
35.
True or false? Copper oxide is a black powder.
True
False
36.
Salts made by the class from oxides. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 10
A
B
C
D
37.
Which statement is NOT correct?
Blue crystals form when copper sulfate solution cools.
Iron oxide + hydrochloric acid → iron chloride + water.
Metal oxide + acid gives hydrogen.
Add the oxide until no more dissolves.
38.
Copper salts can be made from copper oxide although copper metal does ____ react.
not
violently
readily
quickly
39.
Salts made by the class from oxides. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 11
A
B
C
D
40.
Mass of copper oxide dissolving in warm acid. At what value of "Time (min)" is "Oxide dissolved (g)" greatest?
Dr Dabour Hub Academy - figure 12
8
4
0
2
41.
Expected 6.2 g of copper sulfate crystals; got 4.5 g. Percentage yield?
726%
138%
73%
2%
42.
4.0 g of copper oxide added; 0.8 g left over. Mass reacted?
4.8 g
4.0 g
0.8 g
3.2 g
43.
Which statement is correct?
Metal oxides are acids.
Excess oxide stays dissolved.
Nitric acid makes chlorides.
Nitric acid HNO3 makes nitrates.
44.
Mass of copper oxide dissolving in warm acid. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 13
A
B
C
D
45.
Salts in Lake Qinghai water (%). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 14
A
B
C
D
46.
Which term matches this definition? “Makes chlorides.”
Molten iron
Nickel nitrate
Haematite
Hydrochloric acid
47.
Salts made by the class from oxides. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 15
A
B
C
D
48.
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.
49.
Expected 6.2 g of copper sulfate crystals; got 5.0 g. Percentage yield?
81%
124%
806%
8%
50.
pH as copper oxide is added to acid. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 16
"pH" rises to a peak at 2.5, then falls
"pH" increases as "Oxide added (g)" increases
"pH" decreases as "Oxide added (g)" increases
"pH" stays the same
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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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