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What is the pH of this solution?
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Topic: What is the pH of this solution? (Read 3050 times)
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Joniaguis
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What is the pH of this solution?
«
on:
January 14, 2009, 07:25:22 PM »
0.202g of the sodium salt of aspirin (C
9
H
8
O
4
) is dissolved in 100ml of water.
Ka of aspirin is 3.162x10
-4
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AWK
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Re: What is the pH of this solution?
«
Reply #1 on:
January 15, 2009, 01:49:17 AM »
Thi is a problem of salt hydrolysis
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AWK
Joniaguis
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Re: What is the pH of this solution?
«
Reply #2 on:
January 15, 2009, 05:02:56 AM »
Is this answer right?
Kb= [HA][OH
-
] / [A
-
]
[OH
-
]
2
= Kb x [A
-
]
[OH
-
] = 5.6237x10
-7
pOH= 6.25
Therefore pH is equal to 7.75
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Borek
Mr. pH
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I am known to be occasionally wrong.
Re: What is the pH of this solution?
«
Reply #3 on:
January 15, 2009, 06:14:58 AM »
Looks OK.
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ChemBuddy
chemical calculators - stoichiometry, pH, concentration, buffer preparation,
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What is the pH of this solution?