# Is Barium Hydroxide a Strong Base? | Weak or strong base?

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.

## What is a strong base?

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

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.

### Dissociation of barium hydroxide in water

Now we know, Ba(OH)2 dissociate completely in the water.

### How to prove barium hydroxide is a strong base practically? - determine pH

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.

### Basic characteristics of other alkali earth metal hydroxides

• Be(OH)2 , Mg(OH)2 - Weak bases and white precipitates
• Ca(OH)2 - Basic and dissolve in excess water. If ion concentration increases, deposited as a white precipitate.
• Sr(OH)2 , Ba(OH)2 - Strong bases

Basc characteristics of alkali earth metals' hydroxides increases when going down the group.

### BaO and Ba(OH)2

BaO readily dissolve in water to form Ba(OH)2 colourless solution.

## What are the other strong bases?

All alkali metals' hydroxides are strong bases. From alkali earth metal hydroxides, Sr(OH)2 and Ba(OH)2 are strong bases

### Is Ba(OH)2 a strong base than Sr(OH)2?

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.

### Is barium hydroxide acid or base?

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 equation for ba(oh)2 + naoh

Dissociation of Ba(OH)2 and NaOH is occurred separetely as below.

Ba(OH)2 → Ba2+ + 2OH-

NaOH → Na+ + OH-

### Related Tutorials of is Ba(OH)2 a strong acid?

Organic Chemistry Tutorials

Grignard Reagent Reactions and preparing Ethanol to butane Alkanes Carboxylic acids Organic conversions questions and answers