Given four substances P , Q, R and S with pH values 1.0, 8.2, 7.0 and 5.1 respectively. Answer the following questions : a) Which has maximum concentration of OH– ions? b) Do all of them give H+ ions? Justify your answer.

Given four substances P , Q, R and S with pH values 1.0, 8.2, 7.0 and

1.	Given four substances P , Q, R and S with pH values 1.0, 8.2, 7.0 and 5.1 respectively. Answer the following questions : a) Which has maximum concentration of OH– ions? b) Do all of them give H+ ions? Justify your answer.
Answer» a)ph 8.2 will have max.OH- CONCENTRATIONb) YES all of them will give H+reason is ph is inversely PROPORTIONAL to concentration of H+ but KW( ionic PRODUC of water is fixed)so Oh- will have to increase if ph increase. these reactions are in equilibrium so they furnish H+ .