Lesson Worksheet: Acidity and Basicity Chemistry
In this worksheet, we will practice defining acids and bases, understanding their characteristic properties, and identifying acidic and basic species in chemical reactions.
Q2:
Certain bases will react with ammonium chloride to form salt, water, and ammonia gas. Consider the following reaction of sodium hydroxide with ammonium chloride:
What products are needed to complete the chemical equation shown?- A
- B
- C
- D
- E
Q3:
Which of the following statements correctly describes the difference between a strong and a weak acid?
- AIn an aqueous solution, a strong acid ionizes partially, whilst a weak acid ionizes completely.
- BA strong acid is more concentrated than a weak acid.
- CIn an aqueous solution, a strong acid will contain fewer ions than a weak acid.
- DIn an aqueous solution, a strong acid ionizes completely, whilst a weak acid only partially ionizes.
- EA weak acid is more concentrated than a strong acid.
Q4:
Which of the following molecules can not be classified as an Arrhenius base?
- A
- B
- C
- D
- E
Q5:
A student writes the following statement: “A 1 M solution of is a stronger acid than a 0.5 M solution of .”
Why is this statement incorrect?
- A is actually the stronger acid since it contains more atoms.
- B is a weak acid that only partially ionizes in aqueous solutions; therefore, both acids have the same strength.
- CA lower value of molarity corresponds to a stronger acid.
- DThe ions from are more acidic than the ions from .
- EThe strength of an acid refers to the number of molecules that are ionized in aqueous solutions; therefore, and are both strong acids.
What phrase should the student have used instead of stronger?
- AMore diluted
- BWeaker
- CDenser
- DLess concentrated
- EMore concentrated
Q8:
Water can self-ionize in small amounts according to the following equation:
Explain why the self-ionization of pure water produces neither an acidic nor a basic solution.
- AAs a substance can only be acidic or basic when dissolved in water, water itself can be neither.
- BThe ions react with impurities in the water that remove the and ions.
- CThe self-ionization of water produces an equal amount of ions and ions.
- DThe ions quickly react with the air to produce hydrogen gas and oxygen gas that are removed from the water.
Q9:
Which of the following statements describes the difference between an alkali and a base?
- AAn alkali describes a base that dissolves in water.
- BA base is an alkali that dissolves in water.
- CAn alkali forms a blue aqueous solution.
- DA base produces more ions than an alkali.
- EAn alkali accepts ions, whilst a base produces ions.
Q10:
According to Arrhenius theory, which of the following can an acid be defined as?
- AA substance that changes the color of an aqueous solution.
- BA substance that ionizes in an aqueous solution to produce ions.
- CA substance that fizzes when placed into an aqueous solution.
- DA substance that dissolves any substance placed into a solution of it.
- EA substance that ionizes in an aqueous solution to produce ions.
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