Question

In: Chemistry

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

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 need to 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 be added to 18.0ML of 0.1M HB prepare this buffer?

Thank you!

Solutions

Expert Solution

all answer is given plz give rating.

queen_honey_blossom answered 1 year ago
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