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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: tulth on July 16, 2005, 02:33:22 AM

Title: buffer
Post by: tulth on July 16, 2005, 02:33:22 AM

I used 50 ml of 0.2 M Na2HPO4 and 4.1 ml of 0.1 M NaOH  and make volume to 100 ml. (I copy from a book for preparing phosphate buffer pH 11)
What is  the concentration of this buffer?  
How to calculated pH of this buffer? (Please show the ion dissociation)
 and If you sent the answer to me at **** it very good. Thank you very much for your kindness

Title: Re:buffer
Post by: Borek on July 16, 2005, 04:13:22 AM

You are violating forum rules.

At least show us that you tried to do the calculations by yourself.

And never ask on the forum fro the answers to be sent elsewhere. Asked on forum, answered on forum.

Title: Re:buffer
Post by: Donaldson Tan on July 16, 2005, 07:16:56 PM

for starters, use the related Ka expressions and solve them simultaneously