From the graph above, you should notice that the concentration of
H+ are ridiculously small numbers (Eg. 0.000 001 mol/dm
3 vs 0.000 000 01 mol/dm
3) which make them hard to tell apart just like that
GREEN point seems to stick to the y-axis. A logarithmic scale allows the reader
to focus on the exponent and use the exponent to gauge the concentration level.