Dissociation of Barium Hyrdoxide

Question

How many ions are formed when 10.5 moles of barium hydroxide dissociates in water?

Answer 1

The balanced equation is Ba(OH)2 + H2O = BaO + 2H2 + O2.  The ratio of all ingredients is in the equation is 1:1:1:2:1.  If 1 is represented by 10.5 moles, there would be 10.5 moles of Ba(OH)2, 10.5 moles of H2O, 10.5 moles of BaO, 21 moles of H2 and 10.5 moles of O2.

Answer 2

To answer the question, first determine the chemical formula of Barium hydroxide:

Ba(OH)2

next, write a balanced equation describing its dissassociation into ions:

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

The equation indicates three ions are formed for every molecule of Ba(OH)2. Therefore, three times the number of moles of Ba(OH)2 molecules are the number of ions.

Answer 3

Barium hydroxide is known to be a strong base which means that what does dissolve will dissociate completely.   If a mole of Ba(OH)2 dissociates, then 3 moles of ions are produced.

If (if there is sufficient water) 10.5 moles of Ba(OH)2 dissociates then 31.5 moles of ions will be produced.