AL
Chemistry Experiment Report Sheet
Experiment
16: The Action of a Buffer Solution
Name: ___________________
( ) Form 6 S
Data Analysis:
Volume added
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pH on addition of 0.1M NaOH to |
pH on addition of 0.1M HCl to |
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|
Buffer |
Pure water |
Buffer |
Pure water |
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0 |
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1 drop |
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1.0 cm3 |
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5.0 cm3 |
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pH of pure water with minimum air
exposure |
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pH of pure water after 10 minutes air
exposure |
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Questions
1. By
how much (to the nearest unit) does the pH of 25 cm3 of pure water
change for the addition of 1.0 cm3 of 0.1M HCl?
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2. Calculate
the ratio of [H+(aq)] after addition of 1.0 cm3 of HCl to
pure water to [H+(aq)] in pure water.
3. What
must have happened to most of the hydrogen ions added to the buffer?
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4. Why
does the pH of pure water change when exposed to the air?
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