Acid-Base Theories Worksheet
Explore the fundamental concepts of acid-base chemistry including Arrhenius, Brønsted-Lowry, and Lewis theories with this Grade 9 science worksheet.
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Acid-Base Theories
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Date:
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. According to the Arrhenius theory, an acid is a substance that:
Accepts a proton.
Donates a proton.
Produces H+ ions in solution.
Accepts an electron pair.
2. Which of the following is a Brønsted-Lowry base?
HCl
NH3
H2SO4
CH3COOH
1. A Lewis acid is an electron pair .
2. The product formed when an acid donates a proton is called its base.
3. Substances that can act as both an acid and a base are called .
1. All Arrhenius acids are also Brønsted-Lowry acids.
True
False
2. A strong acid completely ionizes in water.
True
False
1. Explain the key difference between a Brønsted-Lowry acid and a Lewis acid.
2. Identify whether the following reaction involves an acid-base reaction according to the Brønsted-Lowry theory, and explain your reasoning: HCl + H2O → H3O+ + Cl-
Observe the pH scale below and answer the questions that follow.
1. What is the pH range for acidic substances?
2. Give an example of a common substance that has a neutral pH.
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