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# What combination of CH 3 COOH and CH 3 COO - make a buffer of pH 3.85( Ka= 1.85x10 -5 ) a) [CH 3 COOH] =.5M [ CH 3 COO - ] =.065M b) [CH 3 COOH]...

What combination of   CH3COOH and CH3COO-  make a buffer of pH 3.85( Ka= 1.85x10-5   )

a) [CH3COOH] =.5M             [ CH3COO-] =.065M

b) [CH3COOH]  =.13M          [CH3COO-] =.13M

c) [CH3COOH] =.5M             [ CH3COO-] =3.88 M

d) [CH3COOH] =1.5M          [ CH3COO-] =.019M

Thanks

correct option is 'a'... View the full answer

• thank you, that makes sence
• kid18
• Jul 20, 2016 at 12:08am
• sense*
• kid18
• Jul 20, 2016 at 12:08am
• uppirocks
• Jul 20, 2016 at 3:42am

c) [CH 3 COOH] =.5M    ... View the full answer

1 comment
• I referred to a key and it says A, but I am not sure how/ why that is.
• kid18
• Jul 19, 2016 at 9:28pm

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