YES. Barium hydroxide is a strong base such as NaOH, KOH.
Barium hydroxide is a group IIA metal hydroxide and it dissolves very well in water to give a strong base solution such as group IA metals hydroxides. Barium hydroxide dissociates completely in water to give barium ions and hydroxyl ions.
A strong base dissociate completely to its cation and anion in the water. This reaction is a not a reversible one.
If OH- concentration is increased more and more, basic strength of base increases.
Example: OH- concentration of aqueous ammonia solution is very less when it compare with OH- concentration of aqueous Ba(OH)2. Therefore aqueous ammonia solution is consider as a weak base and Ba(OH)2 as a strong base.
Solubility of Ba(OH)2 is greater than Be(OH)2, Mg(OH)2, Ca(OH)2 and Sr(OH)2. That is the reason why barium hydroxide become a strong base than other group 2 metal hydroxides.
Now we know, Ba(OH)2 dissociate completely in the water.
Prepare a 0.005 mol dm-3 barium hydroxide solution. You can prepare this solution by measuring 0.86 g of Ba(OH)2 and dissolving it in 1 dm3 of distilled water. Then check the pH of prepared barium hydroxide solution. You can see the pH value is 12.
If pH value is 12, OH- concentration should be 0.01 mol dm-3. It is as twice the prepared Ba(OH)2 solution concentration. Therefore it is clear that, barium hydroxide is a strong base and dissociate completely in the water.
Basc characteristics of alkali earth metals' hydroxides increases when going down the group.
BaO readily dissolve in water to form Ba(OH)2 colourless solution.
All alkali metals' hydroxides are strong bases. From alkali earth metal hydroxides, Sr(OH)2 and Ba(OH)2 are strong bases
Questions asked by Students
Solubility of Ba(OH)2 is much higher than Sr(OH)2. So more OH- amount can be given by Ba(OH)2 to the aqueous solution. Therefore, Ba(OH)2 is a strong base than Sr(OH)2.
See the dissociation of barium hydroxide in the water. You can see, hydroxyl ions (OH-) are given to water from it. Then OH- concentration increses more than H3O+ concentration. So it proves barium hydroxide is an acid.
Dissociation of Ba(OH)2 and NaOH is occurred separetely as below.
Ba(OH)2 → Ba2+ + 2OH-
NaOH → Na+ + OH-