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Author Question: A weak acid has Ka = 4.2 10-3. If [A-] = 2.0 M, what must [HA] be so that [H+] = 2.1 10-3 M? (Read 42 times)

nmorano1

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Question 1

A weak acid has Ka = 1.00 × 10-3. If [HA] = 1.00 M what must be [A-] for the pH to be 2.7?
◦ 0.50 M
◦ 2.0 M
◦ 2.7 M
◦ 0.37 M
◦ 0.75 M

Question 2

A weak acid has Ka = 4.2 × 10-3. If [A-] = 2.0 M, what must [HA] be so that [H+] = 2.1 × 10-3 M?
◦ 1.5 M
◦ 2.0 M
◦ 1.0 M
◦ 0.5 M
◦ 0.25 M


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Marked as best answer by nmorano1 on Jul 8, 2021

maaaaaaaaaa

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nmorano1

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Reply 2 on: Jul 8, 2021
Gracias!


vickyvicksss

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Reply 3 on: Yesterday
Wow, this really help

 

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