Question

PH of Substances in Chemistry: In chemistry, the of a substance, a measure of acidity of a substance, is defined as PH-log[H0 ], where H30+] is the hydrogen ion concentration (which characterizes an acid solution), in moles per liter. a. Find the PH of each substance: [H30+ 3.2 10-5 b. Find the hydrogen ion concentration of each substance, given the PH-

Answer 1

Answer: A. PH=4.50

Explanation:

As we know that pH=-log(H3O+)

pH=-log(3.2x10^-5)

PH= -log(3.2)+log(10^-5)

=-(0.50+(-5))

PH= -(0.5-5)=-(-4.5)

pH=4.50

B. If we know pH , then [H3O+]= 10^-pH