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Grade: 11

                        

Which of the following is the weakest acid? A Phenol ( K a ​ = 1 . 3 × 1 0 − 1 0 ) B Hydrocyanic acid ( K a ​ = 4 . 9 × 1 0 − 1 0 ) C Acetic acid ( K a ​ = 1 . 8 × 1 0 − 1 0 ) D Benzoic acid ( K a ​ = 6 . 5 × 1 0 − 1 0 )

one month ago

Answers : (3)

Vikas TU
12286 Points
							
Dear student 
The weak acid among following is Phenol 
Because it is having least Ka value , among all four. 
So correct option is A. 
Hope this will help 
Good Luck 
one month ago
ankit singh
askIITians Faculty
596 Points
							
please go through the solution 
 solve by askiitians faculty
 ankit singh 

 

A large Ka value indicates a strong acid because it means the acid is largely dissociated into its ions.
A small Ka value means little of the acid dissociates, then it is a weak acid.
 
∴ Phenol is the weakest acid.
 manir bhopal 
 all the best for your futurew endutrewd
one month ago
adilakshmigogada 27
101 Points
							
A large Ka value indicates a strong acid because it means the acid is largely dissociated into its ions.
A small Ka value means little of the acid dissociates, then it is a weak acid.
 
∴ Phenol is the weakest acid.
 manir bhopal 
 all the best for your futurew endutrewd 
16 days ago
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