The pH of an acidic solution is a measure of the concentration of the acid particles in the solution, with smaller values of the pH indicating higher acid concentration. In a laboratory experiment, the pH of a certain acid solution is changed by dissolving over-the-counter antacid tablets into the solution. In this experiment, the pH changes according to the equation , where x is the number of grams of antacid added to the solution. What is the pH of the solution after the addition of 0.1 grams of antacid tablet?
A) 5.14
B) 4.44
C) -0.18
D) 4.78
E) 4.96

Question

The pH of an acidic solution is a measure of the concentration of the acid particles in the solution, with smaller values of the pH indicating higher acid concentration. In a laboratory experiment, the pH of a certain acid solution is changed by dissolving over-the-counter antacid tablets into the solution. In this experiment, the pH changes according to the equation  , where x is the number of grams of antacid added to the solution. What is the pH of the solution after the addition of 0.1 grams of antacid tablet?
A) 5.14 
B) 4.44 
C) -0.18 
D) 4.78 
E) 4.96

Quizplus · Accepted Answer

Substituting x=0.1 into the given equation, we get:

pH = -log(0.6*10^(-0.1)) + 3.2

Using a calculator, we can evaluate this expression to get:

pH ≈ 4.78

Therefore, the pH of the solution after the addition of 0.1 grams of antacid tablet is approximately 4.78, which corresponds to choice D.

The PH of an Acidic Solution Is a Measure of the Concentration