Question

Create a graph of the pH function either by hand or using technology. Locate on your graph where the pH value is 0 and where it is 1.

Answer 1

The PH of a solution is defined by the function:

$PH=-\log \lbrack H^+\rbrack$

Let's try some values for H+ as follows:

H+={3, 2, 1, 0.1, 0.01, 0.001}

Calculating with any scientific calculator, computer, or math tool, we get the following values for PH:

PH={-0.47, -0.3, 0, 1, 2, 3}

With these values, we plot and graph the function as seen below:

The PH value is 0 when H+=1

The PH value is 1 when H+=0.1