Question

Write the chemical equations showing roasting and calcination of zinc ores

Answer 1

here is the answer
is it satisfactory

Answer 2

CALCINATION OF ZINC ORES $ZnCO_{3} ---> ZnO+CO_{2}$.

ROASTING OF ZINC ORES        $2ZnS+3O_{2} --->2ZnO+CO_{2}$

Explanation:

• The calcination is defined as the heating of ores in limited amount of $O_{2}$ (oxygen) or air. The temperature of heating is lower than the melting point of ores in calcination.
• Whereas roasting is the heating of ores in an excess amount of $O_{2}$ (oxygen) or air. In this also, the ores are heating below their melting point.
• Sulphide ores require roasting, whereas carbonate ores require calcination.
• The example of calcination is $ZnCO_{3} ---> ZnO+CO_{2}$.
• The example of roasting is $2ZnS+3O_{2} --->2ZnO+CO_{2}$