ACID,BASE & SALT PART- 1 FOR RAILWAY NTPC 2019,RRB GROUP D 2019,SSC CGL, RAILWAY JE 2019
In this topic we have discussed an important topic from Chemistry i.e ACID,BASE & SALT.
One questions mus come from this topic in competitive exams. Lets discuss the topic
ACID,BASE & SALT
Properties of Acids:
� Produce hydrogen ions [H+] in H2O.
� Sour taste.
� Turn blue litmus red.
� Act as electrolytes in Solution.
� Neutralize solutions carrying hydroxide ions.
� React with several metals releasing Hydrogen gas.
� React with carbonates releasing CO2 (g)
� Destroy body tissues.
� corrode metal surface quickly.
On the basis of origin, acids are classified as
Organic acids: Acids derived from living organisms like plants and animals . For example: citric acid is present in fruits, acetic acid present in vinegar, oxalic acid present in tomato, tartaric acid present in tamarind, lactic acid present in sour milk and curd.
b. Mineral acids: They are also called inorganic acids. They are dangerous Example sulphuric acid (H2SO4), hydrochloric acid (HCl) etc.
On the basis of their strength, acids are classified as :
- Strong acids: Completely dissociate into its ions in aqueous solutions.
Example: Nitric acid (HNO3), sulphuric acid (H2SO4), hydrochloric acid (HCl).
- Weak acids: Weak acids are those acids which do not completely dissociate into its ions in aqueous solutions.
For example: carbonic acid (H2CO3), acetic acid (CH3COOH).
On the basis of their concentration, acids are classified as :
- Dilute acids: Have a low concentration of acids in aqueous solutions.
- Concentrated acids: Have a high concentration of acids in aqueous solutions.
On the basis of number of hydrogen ion, acids can be classified as :
Monoprotic acid – Such type of acid produces one mole of H+ ions per mole of acid, e.g., HCl , HNO3
Diprotic acid – They can produce two moles of H+ ions per mole of acid, e.g., H2SO4.
Triprotic acid – They produce three moles of H+ ions per mole of acid, e.g., H3PO4.
Polyprotic – They can produce more than three H+ ions per mole of acid.
Subscribe Our YouTube Channel – IdeticEdu
