Formic acid is in the venom of some ant species. What is the pH of a 0.35 M solution of formic acid (K, = 1.78 × 10-4 )? %3D O 11.9 1.87 O 2.10 O 0.46 4.20

Chemistry: Matter and Change
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ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
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Chapter18: Acids And Bases
Section18.2: Strengths Of Acids And Bases
Problem 17SSC
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Formic acid is in the venom of some ant species. What is the pH
of a 0.35 M solution of formic acid (K, = 1.78 x 10-4 )?
O 11.9
1.87
O 2.10
O 0.46
4.20
Transcribed Image Text:Formic acid is in the venom of some ant species. What is the pH of a 0.35 M solution of formic acid (K, = 1.78 x 10-4 )? O 11.9 1.87 O 2.10 O 0.46 4.20
Expert Solution
Step 1

Given: Concentration of formic acid HA = 0.35 M

And Ka of HA = 1.78 × 10-4 

The dissociation reaction of HA is given by,

=> HA (aq)  H+ (aq) + A- (aq)

 

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