Chemistry

Multiple Choice

It is a solution that has an excess H⁺ ions.

• Electrolyte

• acid-base solution

• Acid

• Base

Multiple Choice

Acid comes from the Latin word acidus that means _______ or ________.

• Electrolyte, alkali

• dense, bitter

• shinny, sweet

• sharp , sour

Multiple Choice

A substance has a "sour" taste. The substance is going to be considered a/an...

• Acid

• Base

• Electrolyte

Multiple Choice

The more H⁺ ions, the more the solution to be ___________.

• Acidic

• Basic

Multiple Choice

Which statement is NOT a property of an acid.

• Turns blue litmus paper into Red

• Can react with metals

• Do not react with metals

Multiple Choice

Which acid is present in a vinegar?

• Citric Acid

• Acetic Acid

• Ascorbic Acid

• Sulfuric Acid

Multiple Choice

Which acid is present in a sour candies such as lemonhead and sour patch?

• Citric Acid

• Acetic Acid

• Ascorbic Acid

• Sulfuric Acid

Multiple Choice

Which acid is part in the composition of Vitamin C?

• Citric Acid

• Acetic Acid

• Ascorbic Acid

• Sulfuric Acid

Multiple Choice

This type of acid is used in the production of fertilizers, steels, paints and plastics.

• Citric Acid

• Acetic Acid

• Ascorbic Acid

• Sulfuric Acid

Multiple Choice

It is a solution that has an excess OH^- ions.

• Electrolyte

• acid-base solution

• Acid

• Base

Multiple Choice

Another word for Base is _______.

• Alkali

• acid-base solution

• Acid

• Base

Multiple Choice

Bases are substances that can ______ hydrogen ions.

• share

• accept

• release

• give out

Multiple Choice

Which statement is NOT a property of a base.

• Turns red litmus paper Blue

• Can react with metals

• Do not react with metals

• Taste bitter

Multiple Choice

________ and _______ are examples of familiar products that contains bases.

• ascorbic acid

• cetric acid

• vinegar

• Chalk , oven cleaner

Multiple Choice

What is a substance that produces Hydronium ions when it dissolves in Water?

• Acid

• Base

• Ionization

• Hydronium Ion

Multiple Choice

Bases release ____________ ions when they break down or dissociate. 

• Hydrogen (H+)
• Hydroxide (OH-)
• Chlorine (Cl-)
• no

Multiple Choice

Acids produce _________ ions when they break down or dissocciate. 

• Hydroxide (OH-)
• Water
• Chlorine (Cl-)
• Hydrogen (H+)

Multiple Choice

Which of the following is NOT a characteristic of an acid?

• sour taste

• corrosive

• turns litmus paper blue

• neutralises bases

Multiple Choice

Which characteristics describe a base?

• tastes sour, litmus indicator turns blue

• tastes bitter, litmus indicator turns blue

• tastes bitter sour, litmus indicator turns blue green

• tastes bitter sour, litmus indicator turns green

Multiple Choice

Properties of bases are

• feel soapy and neutralise acids

• irritate your skin and react with metals to produce bubbles

• taste sour and turn litmus red

• have pH less than 7

Multiple Choice

Which characteristics describe an acid?

• tastes sour, litmus indicator turns red

• tastes bitter, litmus indicator turns blue

• tastes sweet and sour, litmus indicator turns red

• tastes sour and bitter, litmus indicator turns blue

​Acids and Bases as Electrolytes

​Electrolyte - is a substance that dissolves in water (or other polar solvent) to produce ions and solution that conducts electricity.

​Acids and Bases as Electrolytes

​Acids and Bases are categorized in terms of their "strength", the degree to which they dissociate into ions in water.

Strong acids and strong bases dissolves completely into ions. Therefore, soluble ionic compounds, they are strong electrolytes and conducts a large current.

​Acids and Bases as Electrolytes

​Weak Acids:
HF Hydroflouric acid
H₃PO₄ Phosphoric Acid
CH₃COOH or HC₂H₃O₂ Acetic acid


Weak Base:
NH₃ Ammonia

​Acids and Bases as Electrolytes

​Compounds from non-metals are non-electrolyte.
Example: C₄H₁₀, CCl₄, C₆H₁₂O₆

​Instructions:

Classify each compound whether a Strong Electrolyte, Weak Electrolyte or Non-Electrolyte.

Note: Just type Strong, Weak or Non-E for your answer.

Dropdown

When acids are mixed with water, they release ​

Select answer

ions.

Dropdown

When bases are mixed with water, they release ​

Select answer

ions.

Dropdown

​ According to Arrhenius, ​

Select answer

are substances that, when added to water, increase the concentration of OH- ions.

Dropdown

When added to water, Rubidium Hydroxide (RbOH) will disassociate into Rb⁺ and OH^-. According to Arrhenius, this would be classified as a(n)​

Select answer

because​ it increases the concentration of​

Select answer

ions in water.

Multiple Choice

According to Bronsted-Lowry, which of the following will "donate" an H⁺ ion?

• Acid

• Base

• Solution

• Water

Multiple Choice

What range of values on the pH scale represent solutions with a higher ratio of hydronium (H₃O⁺) ions?

• 0-14

• below 7

• 7

• above 7

Multiple Choice

Which of the following is true .

• Acids and bases form hydroxide ions in solution

• Acids form hydroxide ions and bases hydrogen ions in solution

• Acids form hydrogen ions in solution, bases do not form ions in solution

• Acids form hydrogen ions in solution and bases hydroxide ions

Multiple Choice

What happens immediately after you dissolve acid in water?

• Positively charged hydrogen atoms are released.
• Hydronium ions are released.
• Negatively charged hydrogen atoms are released.
• Neutrally charged hydrogen atoms are released.

Multiple Choice

As the pH of a solution gets lower, the solution becomes more _____.

• acidic

• basic (or alkaline)

• neutral

• ionic

Multiple Choice

Which element is common to all acids?

• Hydrogen

• Oxygen

• Carbon dioxide

• Helium

Multiple Choice

A/an ____________________ has a pH of less than 7.

• Acid

• Base

Multiple Choice

What would happen to the blue and red litmus papers when they are dipped into a sample of acid rain?

• Blue litmus paper remains blue and red litmus paper remains red.

• Blue litmus paper turns red and red litmus paper turns blue.

• Blue litmus paper remains blue and red litmus paper turns blue.

• Blue litmus paper turns red and red litmus paper remains red.

Multiple Choice

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid
• cabbage
• milk

Multiple Choice

What does pH measure?

• the amount of hydrogen (H⁺) ions

• the amount of hydroxide (OH^-) ions

• amount of water

• all of the above

Multiple Choice

Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?

• lemon juice, milk, baking soda, bleach

• bleach, baking soda, milk, lemon juice

• milk, lemon juice, baking soda, bleach

• baking soda, bleach, lemon juice, milk

Multiple Choice

Which pH is considered neutral?

• 1
• 3
• 7
• 14

Multiple Choice

What is the purpose of an "indicator"?

• changes color if a chemical reaction occurs

• changes color if a physical change occurs

• changes color in the presence of an acid or base

• changes color when a salt dissolves in water

Multiple Choice

The pH of 4 solutions were measured in a lab. Which solution is the most acidic?

Multiple Choice

The pH of 4 solutions were measure in a lab. Which of the solutions is the most basic (alkaline)?

Multiple Choice

In the following chemical equation, which compound is the base?

HCl + NH₃ → NH₄⁺ + Cl⁻

• HCl

• NH₃

• NH₄⁺

• Cl⁻

Multiple Choice

In the equation below, what is the Bronsted-Lowry acid?

HCl + NH₃ → Cl^- + NH₄⁺

• HCl

• NH₃

• Cl^-

• NH₄⁺

Multiple Choice

Which reactant in the following equation is a Bronsted Lowry acid?

H₂O + HCl → H₃O⁺ + Cl^-

• Water

• Hydrogen chloride

• Hydronium

• Chloride

Multiple Choice

A combination of particles of one or more substance that are distributed uniformly throughout another substance is a/an

• Mixture

• Substance

• Solution

Multiple Choice

Which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct

Multiple Choice

Bases have many uses. They are mainly used to make

• cleaning products

• soaps

• concrete

• all of the answer choices

Multiple Choice

If the substance is neutral, what would the pH be?

• 3

• 5

• 7

• 9

• 11

Multiple Choice

Which of the following pH values represents a base?

• 2.1

• 4.6

• 6.8

• 8.1

Multiple Choice

Which is the stronger acid?

• pH 1

• pH 4

• pH 8

• pH 13

Multiple Choice

Which of the following is a base?

• baking soda in water

• orange juice

• vinegar

• lemonade

Multiple Choice

The strongest bases have pH values close to

• 0

• 14

• 7

• 5

Multiple Choice

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.

• a stronger acid.

• impossible to tell without testing the pH.

• a stronger base

Multiple Choice

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Multiple Choice

Milk is a very weak acid. What might its pH value be?

• 6.5

• 7.8

• 4.2

• 12.2

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