Question

5 multiple choice 20 points suppose that you test apple juice and find that the hydrogen ion concentration is h+ = 0.0003. find the ph value and determine whether the juice is basic or acidic. formula:
\

$$\begin{aligned} \\text{ph} \\\\ \\text{ph} &= -\\logh+ \\end{aligned}$$

3.5 acidic
3.0 acidic
2.5 acidic
4.0 acidic

Explanation:

Step1: Identify the formula and given value

We know the formula for pH is \( pH = -\log[H^+] \), and the given hydrogen ion concentration \([H^+] = 0.0003\).

Step2: Calculate the logarithm

First, we calculate \(\log(0.0003)\). We know that \( 0.0003 = 3\times10^{-4} \), so \(\log(3\times10^{-4})=\log(3)+\log(10^{-4})\). Since \(\log(10^{-4})=-4\) and \(\log(3)\approx0.4771\), then \(\log(3\times10^{-4})\approx0.4771 - 4=-3.5229\).

Step3: Calculate the pH

Now, we use the pH formula: \( pH = -\log[H^+]=-(-3.5229)\approx3.5 \). And since \( pH < 7 \), the solution is acidic.

Answer:

3.5 acidic