Making Buffers (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What do buffer solutions resist when small amounts of acid or base are added?
What do buffer solutions resist when small amounts of acid or base are added?
Changes in pH
Which combination forms an acidic buffer solution?
Which combination forms an acidic buffer solution?
Weak acid + its conjugate base
What is the Henderson-Hasselbalch equation?
What is the Henderson-Hasselbalch equation?
In the direct method, what mass of sodium ethanoate is used?
In the direct method, what mass of sodium ethanoate is used?
2.05 g
What size volumetric flask is used in the direct method?
What size volumetric flask is used in the direct method?
250 cm³
What is the expected pH for a 1:1 ratio of ethanoic acid to sodium ethanoate?
What is the expected pH for a 1:1 ratio of ethanoic acid to sodium ethanoate?
4.75
In the indirect method, what volume of NaOH is added to 50 cm³ ethanoic acid?
In the indirect method, what volume of NaOH is added to 50 cm³ ethanoic acid?
25 cm³
What is the of ethanoic acid?
What is the of ethanoic acid?
4.75
What [salt]:[acid] ratio is needed for a buffer with pH 4.25?
What [salt]:[acid] ratio is needed for a buffer with pH 4.25?
0.5:1
What volume of 1.0 mol dm⁻³ HCl is added to test the buffer?
What volume of 1.0 mol dm⁻³ HCl is added to test the buffer?
1 cm³