asked 203k views
3 votes
What is the pHpH of a solution obtained by dissolving two extra-strength aspirin tablets, containing 590 mgmg of acetylsalicylic acid each, in 340 mLmL of water?

1 Answer

6 votes

Answer:

The answer to your question is pH = 2.02

Step-by-step explanation:

Data

pH = ?

mass of acetylsalicylic acid = 590 mg

volume of water = 340 ml

Process

1.- Calculate the molecular mass of acetylsalicylic acid

Molecular mass = 180.2 g

2.- Convert the mass to moles

180.2 g -------------------- 1 mol

0.59 g -------------------- x

x = (0.59 x 1)/180.2

x = 0.00327 moles of acid

3.- Calculate molarity

Molarity = moles/volume (L)

Molarity = 0.00327/0.34

Molarity = 0.0096

4.- Calculate the pH of the solution

pH = -log[0.0096]

pH = 2.02

Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.