January 18th, 2008

Chemical Reaction word equations ?

i have a test tomorrow in chem and i dont know what to do with this world problem.

In the first stop of refining zinc metal from its zinc sulfide ore, the ore is heated in the presence of oxygen. The products are solid zinc oxide and sulfur dioxide gas.

what do they mean by “heated “. Do i put Co2 or something ?

I think that when they say “in the prescence of” they mean added with…right ?

1. what do they mean by “heated “. Do i put Co2 or something ?

When something is heated in the air, O2 is a reactant unless otherwise indicated. CO2 is the product. Heating is combustion.

2. I think that when they say “in the presence of” they mean added with…right ?

you are correct

Chem Lab: Distillation Of Strawberry Soda.mpg


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