Is 15 M HCl or 60 M HCl more acidicSolutionfor 15 M HCl H 1

Is 1.5 M HCl or 6.0 M HCl more acidic?

Solution

for 1.5 M HCl

[H+] = 1.5 M

PH = - log[1.5] = - 0.176

for 6.0 M HCl

[H+] = 6.0 M

pH = - log [6] = - 0.778

Lower the pH, greater the acidity.

So, pH = - 0.778 is lower value.

So, the most acidic is 6.0 M HCl