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Acids and alkaline Flashcards

1
Q
A
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2
Q

What is the pH range of an acid?

A

0-6

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3
Q

What is the pH of pure water?

A

B) 7

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4
Q

What is the pH range of an alkali?

A

8-14

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5
Q

What is the chemical formula for hydrochloric acid?

A

HCl

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6
Q

What is the salt formed when hydrochloric acid reacts with sodium hydroxide?

A

B) Sodium chloride

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7
Q

What happens when an acid reacts with a metal?

A

Salt and hydrogen gas are formed.

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8
Q

What is the color of litmus paper in an acidic solution?

A

C) Red

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9
Q

What is the name of the indicator that turns pink in an alkaline solution?

A

Phenolphthalein

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10
Q

What happens when an alkali is dissolved in water?

A

It forms hydroxide ions (OH⁻), making the solution more alkaline.

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11
Q

What is the color of litmus paper in a basic (alkaline) solution?

A

A) Blue

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12
Q

What is the pH of a neutral solution?

A

7

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13
Q

What happens when an acid is added to water?

A

The pH of the solution decreases, making the solution more acidic.

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14
Q

What is the name of the salt formed when sulfuric acid reacts with sodium hydroxide?

A

Sodium sulfate (Na₂SO₄)

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15
Q

Which of the following is a strong acid?

A

B) Hydrochloric acid

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16
Q

What is produced when an acid reacts with a carbonate?

A

Salt, water, and carbon dioxide.

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17
Q

What is the pH of lemon juice?

A

B) 4-6

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18
Q

What happens when an acid reacts with a base?

A

B) Water and salt are produced

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19
Q

What is the salt produced when sulfuric acid reacts with potassium hydroxide?

A

Potassium sulfate (K₂SO₄)

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20
Q

Which of these is an example of a base?

A

B) Sodium hydroxide

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21
Q

What happens when an alkali is added to an acidic solution?

A

The solution becomes less acidic (pH increases).

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22
Q

What is the name of the salt formed when hydrochloric acid reacts with calcium carbonate?

A

Calcium chloride (CaCl₂)

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23
Q

What is the general formula for an alkali?

A

B) NaOH

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24
Q

What is formed when hydrochloric acid reacts with magnesium?

A

A) Magnesium chloride

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25
What color does phenolphthalein turn in a basic solution?
B) Pink
26
What happens when an alkali is added to an acidic solution?
The pH increases (becomes less acidic).
27
What happens when an acid is added to a metal oxide?
B) Water and salt are produced
28
Which of the following is used to measure the pH of a solution?
B) pH paper
29
What is the pH of stomach acid (hydrochloric acid)?
1-3
30
What salt is formed when nitric acid reacts with sodium hydroxide?
Sodium nitrate (NaNO₃)
31
What is produced when an alkali reacts with an acid?
B) Salt and water
32
What is the color of universal indicator in a strongly acidic solution?
B) Red
33
What salt is formed when sulfuric acid reacts with calcium carbonate?
Calcium sulfate (CaSO₄)
34
What is the pH of a typical alkaline solution like sodium hydroxide?
C) 10-14
35
What happens when a strong acid like hydrochloric acid is diluted with water?
The pH of the solution increases (becomes less acidic).
36
What happens when an alkali like sodium hydroxide is dissolved in water?
It dissociates into sodium ions (Na⁺) and hydroxide ions (OH⁻), making the solution alkaline.
37
What is the pH of a solution of citric acid?
B) 4-6
38
What happens when carbon dioxide reacts with sodium hydroxide?
Sodium carbonate (Na₂CO₃) is formed.
39
What is the name of the process where an acid and a base form salt and water?
C) Neutralization
40
What is the general formula for sulfuric acid?
H₂SO₄
41
What is the name of the salt formed when hydrochloric acid reacts with zinc oxide?
Zinc chloride (ZnCl₂)
42
What does the term “alkaline” mean?
It refers to a solution with a pH greater than 7, meaning it is basic.
43
Which of the following is a common acid found in the stomach?
A) Hydrochloric acid
44
What happens to the pH of a solution when an acid is added?
The pH decreases (the solution becomes more acidic).
45
What happens when you add a base to an acidic solution?
C) The solution becomes more basic
46
What is formed when an acid reacts with a base?
B) Salt and water
47
What is the pH of a typical bleach solution?
C) 10-14
48
Which of the following is a weak acid?
B) Acetic acid
49
What happens to the pH of a solution when an alkali is added?
The pH increases (becomes more alkaline).
50
What is the salt produced when hydrochloric acid reacts with ammonium hydroxide?
Ammonium chloride (NH₄Cl)
51
What is the pH of a typical weak acid like vinegar?
B) 4-6
52
What happens when an alkali reacts with an acid?
Salt and water are produced.
53
What is the formula for sodium bicarbonate (baking soda)?
C) NaHCO₃
54
What is formed when an acid reacts with a metal carbonate?
A) Salt and gas
55
What is the salt formed when hydrochloric acid reacts with potassium carbonate?
Potassium chloride (KCl)
56
What is the name of the indicator that turns red in an acidic solution?
Methyl orange
57
What happens to the pH of a solution when you add more acid?
The pH decreases further.
58
What is the pH of a solution of bleach?
C) 12-14
59
What happens when an acid is neutralized by an alkali?
The acid and alkali react to form salt and water.
60
Which of the following is a basic substance?
B) Ammonia
61
What is the formula for potassium hydroxide?
A) KOH
62
What is produced when an acid reacts with water?
The solution becomes more acidic (lower pH).
63
What is the pH of an alkali like sodium hydroxide?
C) 10-14
64
What salt is produced when sulfuric acid reacts with sodium hydroxide?
Sodium sulfate (Na₂SO₄)
65
What is formed when sulfuric acid reacts with calcium hydroxide?
Calcium sulfate (CaSO₄)
66
What indicator turns red in an acidic solution and blue in a basic solution?
Litmus paper
67
What does a pH value of 1 indicate?
Strongly acidic
68
What is the pH of a solution of sodium hydroxide?
12-14
69
Which substance is used to neutralize an acidic soil?
Lime (calcium oxide)
70
What happens when you add an alkali to an acidic solution?
C) The pH increases
71
What is the general term for the reaction between an acid and a base?
Neutralization
72
What is the salt formed when sulfuric acid reacts with magnesium hydroxide?
Magnesium sulfate (MgSO₄)
73
What is the color of methyl orange indicator in a neutral solution?
Yellow
74
What is the formula for nitric acid?
HNO₃
75
What happens when a base reacts with a metal?
Hydrogen gas is produced.
76
What salt is formed when hydrochloric acid reacts with copper oxide?
Copper chloride (CuCl₂)
77
Which of the following is a weak alkali?
C) Ammonia
78
What salt is formed when hydrochloric acid reacts with magnesium hydroxide?
Magnesium chloride (MgCl₂)
79
What is the pH range of a neutral solution?
7
80
What happens when an acid is neutralized by a base?
A) Salt and water are produced
81
Which of the following is an example of a base?
B) Sodium hydroxide
82
What is the color of bromothymol blue indicator in an acidic solution?
Yellow
83
What is the salt produced when nitric acid reacts with calcium hydroxide?
Calcium nitrate (Ca(NO₃)₂)
84
What is the pH of a solution of citric acid?
4-6
85
What happens when sodium hydroxide reacts with sulfuric acid?
Sodium sulfate and water are produced.
86
What happens to the pH of a solution when you add more acid?
The pH decreases (solution becomes more acidic).
87
What is the pH of sodium hydroxide?
12-14
88
What does pH measure?
The concentration of hydrogen ions (H⁺) in a solution.
89
What indicator turns yellow in a basic solution?
Methyl orange
90
What is the pH of a strong alkali like sodium hydroxide?
12-14
91
What is formed when sodium hydroxide reacts with carbon dioxide?
Sodium carbonate (Na₂CO₃)
92
What does an acid release in water?
Hydrogen ions (H⁺)
93
What is the salt formed when sulfuric acid reacts with sodium hydroxide?
Sodium sulfate (Na₂SO₄)
94
What happens when a weak acid is added to a strong base?
The solution becomes less basic (pH decreases).
95
What is the color of phenolphthalein in a neutral solution?
Colorless
96
What happens when an alkali is added to an acidic solution?
The solution becomes more alkaline (pH increases).
97
What is the pH of a solution of sodium chloride?
7
98
What happens when calcium hydroxide reacts with an acid?
Calcium chloride and water are produced.
99
What does pH measure in a solution?
The acidity or alkalinity of a solution.
100
What is the result of mixing an acid and a base?
Salt and water are formed.

Chemistry (1 decks)

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