Answer:
7
Explanation:
pH =-log[H+] and
H+ ion concentration of pure water is 10^-7 making pH value of water =7
Actually this change with temperature as water can get ionised more or less on temperature.
This value is correct only at 25 °C
Acids have higher H+ ion concentration than water so the pH value should be lower than 7.
So answer is 3
