Acids, Bases and Salts: Interactive Quizzes and Learning Materials

Question 1

What is the mathematical formula for calculating the pH of a solution?

Accepted Answer

pH = -log[H+]

Answer

pH = log[H+]

Answer

pH = -log[OH-]

Answer

pH = log[OH-]

Question 2

Which characteristic is NOT associated with acids?

Accepted Answer

Feels slippery

Answer

Turns blue litmus red

Answer

Conducts electricity in solution

Answer

Neutralizes bases to produce salts

Question 3

Provide the chemical formula for sulfuric acid:

Accepted Answer

H2SO4

Answer

H2SO3

Answer

HNO3

Answer

HCl

Question 4

Which of the following accurately defines an acid?

Accepted Answer

A substance that donates protons (H+) in an aqueous solution

Answer

A substance that accepts protons (H+) in an aqueous solution

Answer

A substance that releases hydroxide ions (OH-) in an aqueous solution

Answer

A substance that neutralizes a base

Question 5

In an acid-base titration, the primary function of an indicator is to:

Accepted Answer

Change color at the equivalence point

Answer

Neutralize the solution

Answer

Accelerate the reaction process

Answer

Determine the pH of the solution

Question 6

The chemical formula for sodium chloride is:

Accepted Answer

NaCl

Answer

NaOH

Answer

HCl

Answer

Na2CO3

Question 7

Provide the ionic equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH).

Accepted Answer

H+ + OH- → H2O

Answer

HCl + NaOH → NaCl + H2O

Answer

Na+ + Cl- → NaCl

Answer

H+ + Na+ → HNa

Question 8

What is the conjugate base of the hydronium ion?

Accepted Answer

Hydroxide ion

Answer

Chloride ion

Answer

Hydrogen ion

Answer

Water

Question 9

What pH value represents a neutral solution?

Accepted Answer

7

Answer

0

Answer

14

Answer

10

Question 10

Which of the following substances has basic properties?

Accepted Answer

Sodium hydroxide

Answer

Hydrochloric acid

Answer

Carbon dioxide

Answer

Vinegar

Question 11

When sodium hydroxide reacts with hydrochloric acid, what salt is formed?

Accepted Answer

Sodium chloride

Answer

Potassium chloride

Answer

Calcium chloride

Answer

Magnesium chloride

Question 12

Calculate the molarity of a solution containing 0.1 moles of sodium chloride dissolved in 1 liter of solution.

Accepted Answer

0.1 M

Answer

0.01 M

Answer

1 M

Answer

10 M

Question 13

What is the conjugate base of hydrochloric acid?

Accepted Answer

Chloride ion

Answer

Hydroxide ion

Answer

Sulfate ion

Answer

Carbonate ion

Question 14

What is the name of the salt formed when sodium hydroxide and hydrochloric acid react?

Accepted Answer

Sodium chloride

Answer

Sodium hydroxide

Answer

Hydrochloric acid

Answer

Sodium water

Question 15

What is the pH of a neutral solution at room temperature?

Accepted Answer

7

Answer

0

Answer

14

Answer

It depends on the concentration of the solution

Question 16

Which of the following equations represents a neutralization reaction?

Accepted Answer

Acid + Base → Salt + Water

Answer

Acid + Metal → Salt + Hydrogen

Answer

Base + Metal → Salt + Hydrogen

Answer

Acid + Salt → Base + Water

Question 17

Which of the following is a buffer solution?

Accepted Answer

A solution that resists changes in pH when small amounts of acid or base are added

Answer

A solution that has a pH of 7

Answer

A solution that is highly acidic

Answer

A solution that is highly alkaline

Question 18

Which of the following is an acid? An acid is a substance that donates protons (H+) in a chemical reaction.

Accepted Answer

Hydrochloric acid

Answer

Sodium hydroxide

Answer

Water

Answer

Sodium chloride

Question 19

What is the pH of a neutral solution? pH is a measure of the acidity or alkalinity of a solution. A neutral solution has a pH of 7.

Accepted Answer

7

Answer

14

Answer

10

Answer

0

Question 20

Which of the following reactions is a neutralization reaction? A neutralization reaction is a chemical reaction between an acid and a base that produces a salt and water.

Accepted Answer

Acid + base → salt + water

Answer

Salt + water → acid + base

Answer

Acid + metal → salt + hydrogen

Answer

Base + metal → salt + hydrogen

Question 21

What is the conjugate base of hydrochloric acid? The conjugate base of an acid is the species that is formed when the acid donates a proton.

Accepted Answer

Chloride ion

Answer

Hydrogen ion

Answer

Water

Answer

Sodium ion

Question 22

Which of the following salts is insoluble in water? Solubility rules for salts can be used to predict whether a salt will dissolve in water.

Accepted Answer

Barium sulfate

Answer

Sodium chloride

Answer

Ammonium chloride

Answer

Potassium nitrate

Question 23

What is the name of the acid present in vinegar? Vinegar is a common household item that contains acetic acid.

Accepted Answer

Acetic acid

Answer

Hydrochloric acid

Answer

Sulfuric acid

Answer

Nitric acid

Question 24

Which of the following is a strong base? A strong base is a base that completely dissociates in water to produce hydroxide ions.

Accepted Answer

Sodium hydroxide

Answer

Water

Answer

Ammonia

Answer

Calcium hydroxide

Question 25

Which of the following is a buffer solution? A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it.

Accepted Answer

A solution containing a weak acid and its conjugate base

Answer

A solution containing only water

Answer

A solution containing a strong acid and a strong base

Question 26

Which of the following is NOT a general property of acids?

Accepted Answer

They have a soapy feel when touched.

Answer

They turn blue litmus paper red.

Answer

They react with metals to produce hydrogen gas.

Answer

They taste sour.

Question 27

Which of the following is a typical example of a neutralisation reaction?

Accepted Answer

Adding baking soda (sodium hydrogen carbonate) to vinegar (acetic acid).

Answer

Burning wood.

Answer

Rusting of iron.

Question 28

A solution with a pH of 3 is considered to be:

Accepted Answer

Acidic.

Answer

Alkaline.

Answer

Basic.

Answer

Neutral.

Question 29

When hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH), it forms which salt?

Accepted Answer

Sodium chloride (NaCl)

Answer

Potassium chloride (KCl)

Answer

Magnesium chloride (MgCl2)

Answer

Calcium chloride (CaCl2)

Question 30

What is the chemical formula for sulfuric acid?

Accepted Answer

H2SO4

Answer

CH3COOH

Answer

HNO3

Answer

HCl

Question 31

A water solution of ammonia (NH3) is considered to be:

Accepted Answer

Basic.

Answer

Acidic.

Answer

Amphoteric.

Answer

Neutral.

Question 32

What is the main function of a universal indicator in a chemical reaction?

Accepted Answer

To determine the pH of a solution.

Answer

To create a precipitate.

Answer

To neutralize the reaction.

Answer

To speed up the reaction.

Question 33

A reaction between an acid and a base is called:

Accepted Answer

Neutralisation.

Answer

Oxidation.

Answer

Decomposition.

Answer

Reduction.

Question 34

What is the chemical formula for the salt produced when hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH)?

Accepted Answer

NaCl

Answer

H2O

Answer

HClO

Answer

NaH

Question 35

A solution with a pH of 3 is considered:

Accepted Answer

Acidic

Answer

Alkaline

Answer

Basic

Answer

Neutral

Question 36

Which of the following reactions represents a neutralization reaction?

Accepted Answer

Reaction of hydrochloric acid (HCl) with sodium hydroxide (NaOH)

Answer

Reaction of sodium metal with water

Answer

Burning of methane gas in air

Answer

Decomposition of hydrogen peroxide

Question 37

Which of the following salts is commonly used as table salt?

Accepted Answer

Sodium chloride (NaCl)

Answer

Magnesium sulfate (MgSO4)

Answer

Potassium nitrate (KNO3)

Answer

Calcium carbonate (CaCO3)

Question 38

What is the chemical formula for sulfuric acid?

Accepted Answer

H2SO4

Answer

HCl

Answer

HNO3

Answer

CH3COOH

Question 39

Which of the following is NOT a base?

Accepted Answer

Vinegar

Answer

Sodium hydroxide (NaOH)

Answer

Ammonia (NH3)

Answer

Calcium hydroxide (Ca(OH)2)

Question 40

What is the primary function of a pH indicator in a titration?

Accepted Answer

To signal the endpoint of the reaction.

Answer

To neutralize the analyte.

Answer

To measure the volume of the titrant.

Answer

To increase the rate of the reaction.

Question 41

Which of the following acids is commonly found in citrus fruits?

Accepted Answer

Citric acid

Answer

Sulfuric acid

Answer

Acetic acid

Answer

Hydrochloric acid

Question 42

Acids are chemical substances that typically exhibit which of these properties?

Accepted Answer

React with metals to produce hydrogen gas.

Answer

Feel rough to the touch.

Answer

Turn litmus paper green.

Answer

Have a sweet taste.

Question 43

On the pH scale, what pH range corresponds to a strong base?

Accepted Answer

12-14

Answer

0-2

Answer

7-9

Answer

4-6

Question 44

When a strong acid and a strong base react, what type of chemical reaction occurs?

Accepted Answer

Neutralization reaction, resulting in the formation of salt and water.

Answer

Decomposition reaction, producing a gas.

Answer

Redox reaction, involving electron transfer.

Question 45

Which of these compounds is an example of a salt?

Accepted Answer

Sodium chloride (NaCl)

Answer

Carbon dioxide (CO2)

Answer

Sulfuric acid (H2SO4)

Answer

Sodium hydroxide (NaOH)

Question 46

A solution has a pH of 5. What is the molar concentration of hydrogen ions (H+) present in the solution?

Accepted Answer

1 x 10^-5 M

Answer

1 x 10^-9 M

Answer

1 x 10^-1 M

Answer

1 x 10^5 M

Question 47

In the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH), what is the chemical formula of the salt produced?

Accepted Answer

NaCl

Answer

NaOH

Answer

H2O

Answer

HCl

Question 48

Which of these is NOT a typical application of acids in everyday life?

Accepted Answer

Neutralizing stomach acid.

Answer

Manufacturing fertilizers.

Answer

Pickling and preserving food.

Answer

Cleaning surfaces.

Question 49

If the pH of a solution changes from 2 to 7, what happens to its acidity?

Accepted Answer

The solution becomes less acidic.

Answer

The solution becomes more acidic.

Answer

The solution remains equally acidic.

Answer

The solution becomes neutral.