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polishprodigy93 polishprodigy93
wrote...
Posts: 27
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4 months ago
The pH of a solution of 0.066 mol/L ammonia is?

I got a pH of 11.03 as my answer
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wrote...
Staff Member
4 months ago
Looks to be accurate, given that basic solutions are always >7 pH. We do have an excellent tutorial on this matter:



Please review it, it goes into every detail possible. If you still need help, reply back
- Master of Science in Biology
- Bachelor of Science (Biology)
- Bachelor of Education
Answer accepted by topic starter
bio_manbio_man
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4 months ago
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In the video, kb is given, but in the handbook (the one uploaded by polishprodigy93), it's given as ka. So, I'd recommend you use \(k_w=k_a\times k_b\) to first find kb.

For example:

\(k_b=\frac{1.0\times 10^{-14}}{5.6\times 10^{-10}}\)
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Answer rejected by topic starter
wrote...
4 months ago Edited: 4 months ago, polishprodigy93
@bio_man I used the formula you provided with those values which lead me to two different answers 12.22 and 16.96?
Post Merge: 4 months ago

^disregard I found where my error was! I wasn't subtracting by 14 😂
wrote...
Educator
4 months ago
Thanks for updating
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