Question

What is common in all the water soluble bases (or alkalis)?

Answer 1

Answer:

the common are OH - ions(hydroxyl ions)

they formed when metal oxides dissolve in water

Answer 2

All the bases or alkalis production hydroxide ions in water $(H_2 O)$.

Explanation:

• Alkali is a base and is soluble in water. When it dissolves in water, it gives hydroxide ions $(O H)$. When bases react with acids, they get neutralized.
• Usually, they are metal hydroxide, metal oxides, metal hydro carbonates and metal carbonates.  
• Some concentrated alkali aqueous solutions are soapy, corrosive and may even be harmful. Electricity is conducted due to the presence of ions.