Calculate the hydroxide-ion concentration at 25oC in a 3.2 x 10-03 M Ba(OH)2 solution.?

Question

a)3.1 x 10-12 M
b)6.9 x 10-03 M
c)1.6 x 10-12 M
d)6.4 x 10-03 M
e)6.3 x 1002 M
f)3.2 x 10-03 M

Answer 1

Ba(OH)2 is a strong base which means that it dissociates 100%. Also you don't have a solubility problem for that concentration, so you have all of it dissociating according to the reaction

Ba(OH)2 -> Ba(+2) + 2OH(-)

from the stoichiometry it is obvious that the concentration of OH(-) is going to be double than that of Ba(OH)2, so the correct answer is d)6.4 x 10-03M

Answer 2

b. 1x 10^-5 mol/L its by way of fact in aqueous answer, (H2O) will divided into H+ (hydrogen/proton) and OH-(hydroxyde) with a similar concentration.it is likewise make water pH is 7.00 :)

Answer 3

E