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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: BioNo418 on January 10, 2007, 12:33:19 AM

Title: Stiochiometry
Post by: BioNo418 on January 10, 2007, 12:33:19 AM

Nitric Acid and zinc react to form zinc nitrate, ammonium nitrate, and water. how many atoms of zinc react with 1.49g of nitric acid?

Is this the correct way to the skeleton key? HNO₃ + Zn ---> ZnNO₃+ NH₃ +H₂O

Can someone please help me out? Im really stuck on Stiochiometry.

Thank You~

Title: Re: Stiochiometry
Post by: enahs on January 10, 2007, 12:54:50 AM

Not quite.

You have ammonia in the products, but your description call for ammonium nitrate.

Also, your zinc nitrate product is wrong. The nitrate ion has a charge of -1, Zn typically forms a +2 charge in ionic compounds. You must balance the charge and make them neutral (add more nitrate ion, how much more?).

Title: Re: Stiochiometry
Post by: AWK on January 10, 2007, 02:27:17 AM

You should balance this reaction
HNO₃ + Zn ---> Zn(NO₃)₂+ NH₄NO₃ +H₂O

Title: Re: Stiochiometry
Post by: BioNo418 on January 10, 2007, 03:13:04 AM

oOoOoOo  :) Thank you. And how do we find the atoms? Do we use Avogadro's number?

Title: Re: Stiochiometry
Post by: AWK on January 10, 2007, 03:48:30 AM

Just a moment. This is unbalaced equation. Before you start calculation, it should be balanced