Use the acidity model given by
pH = −log[H+],
where acidity (pH) is a measure of the hydrogen ion concentration [H+] (measured in moles of hydrogen per liter) of a solution.
Compute [H+] for a solution in which pH = 6.2. (Enter your answer in scientific notation. Round the decimal value to two decimal places.)
To compute the hydrogen ion concentration [H+] for a solution with a given pH value, you can use the equation:
[H+] = 10^(-pH)
In this case, you are given a pH value of 6.2. So, to find the hydrogen ion concentration [H+], you can substitute 6.2 into the equation:
[H+] = 10^(-6.2)
To evaluate this expression, you can use a calculator or follow these steps:
1. Take the negative of the pH value: -6.2
2. Calculate the base 10 raised to the power of -6.2: 10^(-6.2)
3. The value of [H+] will be equal to the result obtained in step 2.
Using a calculator, you will find that 10^(-6.2) is approximately 7.94 x 10^(-7). Rounding this to two decimal places gives us the final answer:
[H+] ≈ 7.94 x 10^(-7) (in scientific notation)