this is the experiment about Hydrogen phosphate buffer systems. this is the disc
ID: 893885 • Letter: T
Question
this is the experiment about Hydrogen phosphate buffer systems.
this is the discussion part of report. Please answer the questions and let me know about the concepts and ideas needed to analyze following questions.
The conclusion section should include several paragraphs with the following:
?(Exp. part 1, 3): Compare the effect on pH of 0.50M HCl or NaOH addition to distilled water with addition to the buffer.
?(Exp. part 2): Compare the pH of the buffers solution no.1~5 and describe what did you notice. Explain your results using the Henderson-Hasselbach equation.
?(Exp. part 3~4) A discussion on the similarities and differences between the buffer and dilute buffer should be included. How does the concentration of the buffer affect the buffer capacity?
? Any possible errors should be discussed as usual.
Explanation / Answer
Solution :-
Conclusion :-
The experiment was to study the buffer system and effect on the pH of the buffer system after the addition of the HCl and NaOH solutions to the buffer system.
In the part 1 the HCl and NaOH solutions were added to water and the pH was measured to be 2.34 when the HCl was added to water and pH was 12.82 when NaOH was added to water. This shows that without the buffer system the pH of the water changes drastically when the acid or base added to the water. But when the HCl was added to the buffer system then pH change was very small gradually increasing the addition of the HCl decreases the pH by small extent and in case of the NaOH addition the pH increases slowly as the NaOH solution was added to the pH. Therefore it concludes that the buffer system resist the sudden pH change when acid or base solutions are added to the buffer system.
The concentrated buffer and dilute buffer both will have the weak acid and its conjugate base of weak base and its conjugate acid to make the buffer system. But the strong buffer with higher concentrations will resist the pH change more effectively as compared to the dilute buffer system.
The possibility of the error in the experiment may arise if the solutions of the acid and base gets contaminated with one another.
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