Question

Use the equation pH = −log(H+), where H+ is the hydrogen ion concentration of a solution. Find the pH of a baking soda solution for which the hydrogen ion concentration is 3.55 ✕ 10−4. Round to the nearest tenth. pH =

Answer 1

Answer: Using the given equation \( \text{pH} = -\log(\text{H}^+) \), where H+ is the hydrogen ion concentration, we can calculate the pH of the baking soda solution:

Given: Hydrogen ion concentration (\( \text{H}^+ \)) = \( 3.55 \times 10^{-4} \)

Plugging in the value:

\( \text{pH} = -\log(3.55 \times 10^{-4}) \)

Calculating the logarithm using a calculator:

\( \text{pH} \approx -(-3.4502) \)

\( \text{pH} \approx 3.4502 \)

Rounded to the nearest tenth:

\( \text{pH} \approx 3.5 \)

Therefore, the pH of the baking soda solution is approximately 3.5.

Step-by-step explanation:

Answer 2

pH

pH is a measure of how acidic or basic a substance is. It stands for potential of hydrogen, and is determined using the negative log of the hydrogen ion concentration in a substance.

`pH = -log[H+]` (where [H+] is hydrogen ion concentration)

Given that the [H+] is
`3.55*10^(-4)` mol/L, we can solve for pH using the equation:

`pH = -log(3.55*10^(-4))\\\\pH=3.44977164`

Rounded to 3 significant figures, we have 3.45 as the pH.

Answer

pH = 3.45