Question

pH of 1M solution of base M(OH)2 is 50% dissociated
a)zero
b)1
c)13
d)14​

Answer 1

Answer:

oh is 14

(d) is correct option

Answer 2

Answer:correct option is d

Explanation:

Dissociation constant k=[no of moles dissociated]/[total no of moles]=0.5

Now this indicates that the base is a weak base since only some amount of base is dissociated

Inorder to get the oh- concentration we use the formula

[OH-]=CK=1M*0.5*2=1 (as 2 moles of OH- for one mole base )

Therefore pOH=-log(OH-)=-log(1)=0

pH=14-pOH=14