Question

Differentiate between acids and bases.

Answer 1

Acids are substances which have sour taste.Acidic nature of a substance is due to the presence of h+ions.
 Bases are substances which are bitter in taste.basic nature of a substance is due to the presence of OH-ions.

Answer 2

difference between acid and base
acid: they are sour in taste
      : they turn blue litmus to red 
      : they cause sting when get in contact with skin 
      : ph value is 0 to 7 
base: they are bitter in taste  
        : they turn red litmus to blue 
        : they are soapy in touch 
        : ph value is 7 to 14