Consider the 50 mL 0.1 M phosphate buffer at a pH of 7.4.If 0.5 mL of 1 M HCI was added to the buffer, what is the expectedpH?Hint: In the Henderson-Hasselbalch equation, use the theoretical pkayou calculated in Question 10 and consider the effect adding a strongacid will have on the phosphate buffer. To help with the latter, use thetable below:Initial Concentration (in M)Initial Amount (in mmol)Change (in mmol)New Amount (in mmol)2-H₂PO4HPO4Express your answer to two places past the decimal.

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Consider the 50 mL 0.1 M phosphate buffer at a pH of 7.4. If 0.5 mL of 1 M HCI was added to the buffer, what is the expected pH?

Chemistry

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

Consider the 50 mL 0.1 M phosphate buffer at a pH of 7.4.
If 0.5 mL of 1 M HCI was added to the buffer, what is the expected
pH?
Hint: In the Henderson-Hasselbalch equation, use the theoretical pka
you calculated in Question 10 and consider the effect adding a strong
acid will have on the phosphate buffer. To help with the latter, use the
table below:
Initial Concentration (in M)
Initial Amount (in mmol)
Change (in mmol)
New Amount (in mmol)
2-
H₂PO4HPO4
Express your answer to two places past the decimal.

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