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Topic: Solving for pH using ideal gas law  (Read 742 times)

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Offline Timeless Thinker

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Solving for pH using ideal gas law
« on: April 02, 2020, 05:22:35 PM »
I had this question on my chemistry assignment:

A 250 mL sample of gaseous hydrogen bromide, measured at 23.7°C and .945 atm, was dissolved in sufficient pure water to form 250 mL of solution. What was the pH of the solution?

So I used PV=nRT to solve for n
(.945*.25)/(.0821*296.85)
n=.00969

This is where I'm unsure:
.00969/.250=.03877
-log[.03877]= 1.411

Should n be divided by 250 mL or is it a different number?



Offline mjc123

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Re: Solving for pH using ideal gas law
« Reply #1 on: April 02, 2020, 05:26:02 PM »
Looks correct to me.

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