Question

Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite mineral rhodochrosite, involves a two-step process. In the first step, manganese (II) carbonate and oxygen react to form manganese (IV) oxide and carbon dioxide: (s)(g)(s)(g) In the second step, manganese (IV) oxide and aluminum react to form manganese and aluminum oxide: (s)(s)(s)(s) Write the net chemical equation for the production of manganese from manganese (II) carbonate, oxygen and aluminum. Be sure your equation is balanced.

Answer 1

The net chemical reaction of the given process:

`6MnCO_3(s)+3O_2(g)+8 Al(s)\rightarrow 6CO_2(g)+6Mn(s)+4Al_2O_3(s)`

Step-by-step explanation:

Step 1: Manganese (II) carbonate and oxygen react to form manganese (IV) oxide and carbon dioxide.The chemical reaction is given as:

`2MnCO_3(s)+O_2(g)\rightarrow 2MnO_2(s)+2CO_2(g)`

Step 2:Manganese (IV) oxide and aluminum react to form manganese and aluminum oxide.The chemical reaction is given as:

`3MnO_2(s)+4Al(s)\rightarrow 3Mn(s) +2Al_2O_3(s)`

On adding reactions of 3 × [1] + 2 × [2] , we get net chemical reaction of the given process:

`6MnCO_3(s)+3O_2(g)+8 Al(s)\rightarrow 6CO_2(g)+6Mn(s)+4Al_2O_3(s)`

According to reaction,6 moles of manganese(II0 carbonate recats with 3 moles of oxygen gas and 8 moles of aluminum to give 6 moles of manganese , 6 moles of carbon dioxide gas and 4 moles of aluminum oxide.