To determine the pH values of apple juice and ammonia using the given formula [tex]\( \text{pH} = -\log \left[ H _3 O ^{+} \right] \)[/tex], we'll go through the following steps for each liquid.
### Apple Juice
1. Identify the hydronium ion concentration: The hydronium ion concentration for the apple juice sample is [tex]\( [H_3O^+] = 0.0003 \)[/tex].
2. Apply the pH formula:
[tex]\[
\text{pH} = -\log \left[ 0.0003 \right]
\][/tex]
3. Calculate the pH:
[tex]\[
\text{pH} = 3.5228787452803374
\][/tex]
### Ammonia
1. Identify the hydronium ion concentration: The hydronium ion concentration for the ammonia sample is [tex]\( [H_3O^+] = 1.3 \times 10^{-9} \)[/tex].
2. Apply the pH formula:
[tex]\[
\text{pH} = -\log \left[ 1.3 \times 10^{-9} \right]
\][/tex]
3. Calculate the pH:
[tex]\[
\text{pH} = 8.886056647693163
\][/tex]
### Conclusion
Based on our calculations:
- The pH value of apple juice is 3.52.
- The pH value of ammonia is 8.89.
These steps lead us to the final values for each liquid.
