Level:
Project ID:
1103170801
Accepted:
1
Clonable:
0
Easy:
0
The acidity of a substance is measured by its \( pH \) value. In practice, \( pH \) is often assumed to be the negative logarithm of the hydrogen ion concentration \( H^+ \) (i.e. the number of moles of hydrogen ions per liter of solution):
\[ pH = -\log{(H^+ )}. \]
In one of the following pictures is a part of the \( pH-H^+ \) graph. Choose the picture.
