Question

What is the pH of a solution with a [H+] of 1.0×10−4 M ?
1)2.0
2)3.0
3)4.0
4)8.0

Answer 1

`\huge{ \boxed{4}}`

Step-by-step explanation:

The pH of the solution can be found by using the formula:

`\bold{pH = -log([{H}^(+)])}`

From the question:

`[{H}^(+)] = 1.0 * {10}^(-4)\: M`

`\therefore \: pH = - log(1.0 * {10}^( - 4) ) \\ = 4`

Answer 2

The pH of a solution with a [H+] of 1.0×10⁻⁴ M is 4.0, as the pH is the exponent of the hydrogen ion concentration represented in scientific notation with a positive sign.

Step-by-step explanation:

To calculate the pH of a solution when given the concentration of hydrogen ions ([H+]), we use the formula: pH = -log[H+]. Using this formula, the pH of a solution with a [H+] of 1.0×10⁻⁴ M is calculated by taking the negative logarithm of 1.0×10⁻⁴, which gives us a pH of 4.0. This is because when [H+] is in the form of 1 × 10 to the power of a negative number, the pH is simply that power of 10 but with a positive sign.

For example, the pH of a solution with [H+] = 1 × 10⁻² M is 2, and the pH of a solution with [H+] = 1 × 10⁻¹⁰ M is 10.