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  3. part a: an acid (ha) dissociates as follows: ha â

Part A: An acid (HA) dissociates as follows: HA → H+ + A- The pH of the...

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Chemistry

Part A: An acid (HA) dissociates as follows:

HA → H+ + A-

The pH of the 0.25 M solution of HA is 4.64.

What is [A-]?

Express your answer as a decimal, not an exponent.

Part B:

An acid (HA) dissociates as follows:

HA → H+ + A-

The pH of the 0.88 M solution of HA is 1.91.

What is [HA]?

Express your answer as a decimal, not an exponent.

Part C:

An acid (HA) dissociates as follows:

HA → H+ + A-

The pH of the 0.85 M solution of HA is 1.22.

What is the Ka of HA?

Express your answer as a decimal, not an exponent.

Part D:

A student needs to prepare a buffer solution with a PH of 4.43.Assuming a PKa of 4.70 how many ML of 0.1M B- would needto be added to 18.0ML of 0.1M HB prepare this buffer?

Part E:

A student needs to prepare a buffer solution with a PH of 5.78.Assuming a PKa of 4.42 how many ML of 0.1M NaOH would need to beadded to 18.0ML of 0.1M HB prepare this buffer?

Thank you!

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