Question

PLEASE HELP!!!Choose from the given list of aqueous solutions (A-D).Solution A has [H3O+] = 3.5×10-5 M.Solution B has [H3O+] = 3.5×10-4 MSolution C has [OH-] = 1.3×10-10 MSolution D has [OH-] = 6.2×10-11 MWhich solution is the least acidic?Which solution has the highest pH?Which solution is the most basic?Which solution is the least basic?

Answer 1

Explanation:

Determine the pH of all solutions

A: pH = -log[H3O+]

= -log[3.5*10^-5]

= 4.46

B: pH = -log[H3O+]

= -log[3.5*10^-4]

= 3.46

C: pH = -log[OH-]

= -log[1.3*10^-10]

= 9.89

D: pH = -log[OH-]

= -log[6.2*10^-11]

= 10.21

Answer:

A: answer is D

B: answer is D

C: answer is D

D: answer is B