Question

The ph of the solution is less than 7 what does it indicate?what is the ph of 1 m hcl solution

Answer 1

if the pH of the solution is less than 7 it indicates that the solution is acidic

Answer 2

less than 7 indicates that the [H+] concentration is greater than (10^-7)
By Ionic Product Rule Applicable at 25 degree Celsius [OH-] concentration will be lesser than (10^-7)
Hence greater H+ concentration indicates acidic nature of solution

1M HCl dissociates into 1 mole of H+ ions in 1 litre of solution
hence [H+] concentration = 1
pH is negative log of H+ ion concentration
so
-log[H+]
-log1
= 0
Hence pH will be 0