What is acids? Give any two examples.
Acids are those chemical substances that gives hydrogen ions when dissolved in water.
For example: HCl -----> H+ + Cl-
H2SO4 -----> 2H+ + SO4--
Acetic acid is called a weak acid ?
Acetic acid has a very low concentration of hydrogen ions ( H+ ) in its aqueous solution. So, acetic acid is called weak acid.