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Acetylsalicylic acid (aspirin), HC9H7O4, is the most
Chapter 18, Problem 55P(choose chapter or problem)
Problem 55P
Acetylsalicylic acid (aspirin), HC9H7O4, is the most widely used pain reliever and fever reducer. Find the pH of 0.018 M aqueous aspirin at body temperature (Ka at 37°C = 3.6 × 10-4).
Questions & Answers
QUESTION:
Problem 55P
Acetylsalicylic acid (aspirin), HC9H7O4, is the most widely used pain reliever and fever reducer. Find the pH of 0.018 M aqueous aspirin at body temperature (Ka at 37°C = 3.6 × 10-4).
ANSWER:
Step 1 of 3
The dissociated and undissociated amount of any weak acid is represented via acid-dissociation constant. This is helpful to calculate pH, percent dissociation and also predicting acidic strength of various acids.
Given Data:
*The acid-dissociation constant of aspirin is 
*The concentration of aspirin is 0.018 M.
The dissociation of aspirin is as follows:
The ICE table of above reaction is as follows:
