The pH of a solution is given by the formula pH = -log H+ , where H+ is the concentration of hydrogen ions in moles
per liter in the solution. Use this formula to solve the problem. Round answer to one decimal place if necessary.
Find the pH of a sample of lake water whose [H+] is 3.05 × 10^-9 moles per liter.
pH = -log(3.05 x 10^-9)
Use a calculator. The pH should be between 8 and 9 (looking at the exponent).
To find the pH of a sample of lake water with a hydrogen ion concentration of 3.05 × 10^-9 moles per liter, we can use the pH formula:
pH = -log[H+]
First, we substitute the given hydrogen ion concentration value into the formula:
pH = -log(3.05 × 10^-9)
Next, we can evaluate the logarithm using a calculator:
pH ≈ -log(3.05 × 10^-9) = -(-8.516015471) ≈ 8.5
Therefore, the pH of the lake water sample is approximately 8.5.