January 25, 2021, 01:33:19 AM
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Topic: Acids and Bases. Finding pH of Calcium Hydroxide  (Read 672 times)

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Offline InsaneDefense

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Re: Acids and Bases. Finding pH of Calcium Hydroxide
« Reply #15 on: January 09, 2021, 11:22:00 PM »
Alright guys, it looks like I got what I was looking for.

From concentration of Calcium Hydroxide in the solution you antilog it.

pOH=-log0.0843 mol/L = 1.07417

pH = 14 - pOH - > 14 - 1.0742.

That was all. and to find the concentration I would use the negative of pH or pOH as a power of 10, so [OH^-]=10^-pOH or [H3O+]=10^-pH.


Thanks for the help though guys. ;)

Offline AWK

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Re: Acids and Bases. Finding pH of Calcium Hydroxide
« Reply #16 on: January 10, 2021, 03:02:45 AM »
Quote
pOH=-log0.0843 mol/L = 1.07417
Wrong calculation.
AWK

Offline Borek

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Re: Acids and Bases. Finding pH of Calcium Hydroxide
« Reply #17 on: January 10, 2021, 04:45:44 AM »
From concentration of Calcium Hydroxide in the solution you antilog it.

pOH=-log0.0843 mol/L = 1.07417

No.

Quote
pH = 14 - pOH - > 14 - 1.0742.

That would be OK if not for the fact you ignored all advice given about the first step.

Think again: you have a 0.1M solution of CaCl2. What is concentration of Ca2+? What is concentration of Cl-? Is it in any general way different from the solution of Ca(OH)2?
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