A substance which can ionize to give OH ions is a base (Arrhenius); A substance which accepts H+ is a base (Bronsted-Lowry); A substance which accepts a pair of electrons is a base (Lewis). Any substance which falls into anyone or more than one of these definitions is a base. An alkali is a special type of base which is soluble in water. Every base is not an alkali. see whether you can understand these statements:- "EVERY ALKALI IS A BASE BUT EVERY BASE IS NOT AN ALKALI" Thus you can see that you cannot say that base doesnt dissolve in water. It is just that we have a special name for bases which dissolve in water to give OH ions: alkali. A base may or may not give OH in water or even may or may not be soluble in water, but an alkali always has both these properties. Ca(OH)2, NaOH, Ba(OH)2 are base as well as alkali but NH3 is only a base (Bronsted) not alkali. The main thing is that a base which is soluable in water is an alkali whereas a base which is not soluable in water is not an alkali.

Overview of Acids and Bases

Acids and bases are two important types of chemical substances that are commonly found in nature. Acids are substances that have a pH value of less than 7, while bases have a pH value of greater than 7. Neutral substances have a pH value of 7.

Acids and bases are important in many chemical reactions and play a crucial role in many industries, including the food, pharmaceutical, and chemical industries. In this article, we will focus on the difference between alkalies and bases.

Alkalies vs. Bases

Alkalies are a type of base that is soluble in water and produces hydroxide ions (OH-) when dissolved. Examples of alkalies include sodium hydroxide (NaOH) and potassium hydroxide (KOH). All alkalies are bases, but not all bases are alkalies.

Bases, on the other hand, are substances that can neutralize acids and have a pH value greater than 7. Bases can be divided into two types: strong bases and weak bases. Strong bases, such as sodium hydroxide and potassium hydroxide, completely dissociate in water and produce a large number of hydroxide ions. Weak bases, such as ammonia (NH3), do not completely dissociate in water and produce only a small number of hydroxide ions.

Conclusion

In summary, alkalies are a type of base that is soluble in water and produces hydroxide ions when dissolved. All alkalies are bases, but not all bases are alkalies. Bases can be divided into strong bases and weak bases and play an important role in many chemical reactions and industries. Understanding the differences between acids and bases is important in chemistry and in our daily lives.