Which of the following is the overall reaction that takes place when a strong acid is added to a buffer containing equal amounts of acetic acid and acetate ions?
CHEMISTRY, M6 EQ-Bank 27
What determines the pH of a buffer solution? (2 marks)
CHEMISTRY, M6 EQ-Bank 29
Explain why a mixture of acetic acid (1 M) and sodium acetate (1 M) can act as a buffer while a mixture of hydrochloric acid (1 M) and sodium chloride (1 M) cannot. (3 marks)
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CHEMISTRY, M6 2018 HSC 17 MC
Increasing amounts of carbon dioxide were dissolved in two beakers, one containing water and one a mixture of water and a buffer. The pH in each beaker was measured and the results graphed.
Which graph best represents the results?
CHEMISTRY, M6 2018 HSC 15 MC
A solution containing potassium dihydrogen phosphate and potassium hydrogen phosphate is a common laboratory buffer with a
Which row of the table correctly identifies the chemistry of this buffer?
CHEMISTRY, M6 2015 HSC 24
- Explain why the salt, sodium acetate, forms a basic solution when dissolved in water. Include an equation in your answer. (2 marks)
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- A solution is prepared by using equal volumes and concentrations of acetic acid and sodium acetate.
- Explain how the pH of this solution would be affected by the addition of a small amount of sodium hydroxide solution. Include an equation in your answer. (3 marks)
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CHEMISTRY, M6 2017 HSC 14 MC
One litre of an aqueous solution is formed from mixing equal volumes of 0.2 mol L
How effective as a buffer is the aqueous solution formed?
- Ineffective, because
is a strong acid - Effective, because
is the conjugate base of - Ineffective, because
forms a neutral salt solution - Effective, because the pH would change when a solution of
is added
CHEMISTRY, M6 2019 HSC 22
A buffer was prepared with acetic acid and sodium acetate. A few drops of universal indicator were then added. When small amounts of either 0.1 mol L ¯1
Explain these observations. Support your answer with at least ONE chemical equation. (4 marks)
CHEMISTRY, M6 2020 HSC 8 MC
CHEMISTRY, M6 2021 HSC 34
Gaseous
Explain the observed pH of the water and each of the solutions at