Problem 3:
What is the pH of a solution if the concentration of hydrogen ions is ?

Ask by Kelley Marshall. in Hong Kong

Mar 28,2025

Question

Problem 3: What is the pH of a solution if the concentration of hydrogen ions $$ \left[H^{+}ight] $$is $$ 1.0 	imes 10^{-4} \mathrm{M} $$ ?

UpStudy AI · Accepted Answer

1. We start with the definition of pH:  
   $$
   \text{pH} = -\log[H^+]
   $$

2. Given $$ [H^+] = 1.0 \times 10^{-4} \,\text{M} $$, substitute into the formula:
   $$
   \text{pH} = -\log(1.0 \times 10^{-4})
   $$

3. Evaluate the logarithm:
   $$
   \log(1.0 \times 10^{-4}) = -4
   $$

4. Therefore, the pH is:
   $$
   \text{pH} = -(-4) = 4
   $$

Thus, the pH of the solution is $$ 4 $$.
The pH of the solution is 4.

Problem 3:
What is the pH of a solution if the concentration of hydrogen ions is ?