Question

explain the difference between acid and Alkali

Answer 1

acids
1 - Acids have a low pH range of 1 - 6.9 
2 - Acids contain hydrogen.
3 - Acids have a sour and a sharp taste

alkali
1 - Alkaline have a high pH range if 7.1 - 14

7.0 is neutral.
2 - Alkaline contain hydrooxide particles.
3 - Alkaline have a bitter taste.

Answer 2

acids are the elements which have high concentration of h + ions , and the highly reactive acid are in the 17th group like fluorine extra and alkali is the very first group of the periodic table example lithium