My DOUBT: Why metal oxides are bases as they don't have OH? For example NaOH is a base and we can clearly see that it will dissociate OH- ions in water because it has OH, but if we take example of K2O then it doesn't have OH then also it as a base. WHY??
Answers
Explanation:
All metal oxides are basic in nature. 95% of the whole Periodic Table are metals. The rest are non metals. They are in upper right of the Table. Few Metals react with Oxygen in the atmosphere become metal oxides. When they are mixed with water like acid rain, they become base. You are asking why metal oxides are basic, it’s because you put them in water. Then water is reacting to metal oxides. Metal oxide reacts with H20 water and H20 water molecule pulls oxide ion (O -2) from metal oxide then water molecules add that oxide ion to become 2 OH ions. It makes water basic because of more -OH ions now. Let's get back to the K2O case. The potassium ion actually two potassium ions aqueous plus we'll get the hydroxide ion oh minus in this oh minus that's what makes this a base