Answer:
A
Step-by-step explanation:
To find the pH of vinegar, we can use the given formula pH= -log[H+], where [H+] is the hydronium ion concentration in the vinegar.Substituting the given value of hydronium ion concentration [H+] = 1.6 × 10^-3 M in the above formula, we get:pH = -log(1.6 × 10^-3)Using a calculator, we can evaluate the logarithm to be 2.8.Therefore, the pH of the vinegar is 2.8.Hence, the correct answer is option A) 2.8.