BiochemistrypH Buffers
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BiochemistrypH Buffers
Hi,
I'm a bit confused as to how to solve this problem.
1. Calculate the amount of 0.5 M lactic acid/1.0M lactate you would need to make a 3.3M M100 mL solution with the pH of 4.80 and the pKa is 3. 9.
First you would use the equation .5M x (Y)= 3.3 M x (100mL)
that gives you 660 mL which is impossible since you have to make it 100mL?
Thanks,
Gina
I'm a bit confused as to how to solve this problem.
1. Calculate the amount of 0.5 M lactic acid/1.0M lactate you would need to make a 3.3M M100 mL solution with the pH of 4.80 and the pKa is 3. 9.
First you would use the equation .5M x (Y)= 3.3 M x (100mL)
that gives you 660 mL which is impossible since you have to make it 100mL?
Thanks,
Gina
greenpak07 Student
 Posts : 6
Join date : 20081201
Re: BiochemistrypH Buffers
Hi Gina,
You are right; it is not possible to make 100ml of 3.3M solution out of 0.5M one. However, I would suggest you double check the problem  I think that
"3.3M M100 mL solution " was supposed to be 3.3 mM 100ml solution  then everything makes sense.
You are right; it is not possible to make 100ml of 3.3M solution out of 0.5M one. However, I would suggest you double check the problem  I think that
"3.3M M100 mL solution " was supposed to be 3.3 mM 100ml solution  then everything makes sense.
Alla Instructor
 Posts : 103
Join date : 20080227
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