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?

The answer to your question is pH = 2.02

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

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