Saturday, December 26, 2009

Somebody help me figure out this stoichiometry questions?

One more of potassium permanganate reacts completely with excess hydrochloric acid according to the following reaction:





16HCL + 2KMnO4 ----%26gt; 2KCl + 2MnCL2 + 5Cl +8H20





1. How many morels of water are produced?


2. How many grams of potassium chloride are produced?


3. How many morels of hydrochloric acid are reacted?











I've been trying to work on this for a really long time and I don't get it at all!


Someone please please please help me!Somebody help me figure out this stoichiometry questions?
moles, not morels.





You don't have a balanced equation. For instance, the number of Cl's on the left must equal the number on the right.Somebody help me figure out this stoichiometry questions?
Chlorine gas (a diatomic gas) is a product so the balanced equation is:





16HCL + 2KMnO4 ----%26gt; 2KCl + 2MnCL2 + 5Cl2 +8H20





Now the coefficients give the molar relationships





So 1. 8 moles of water are produced





2. Molar mass KCl = 39.10 + 35.45 = 74.55 g





Number of moles KCl produced = 2





So mass KCl produced = (74.55g KCl / mol KCl ) x 2 mol KCl = 149.1 g KCl





3. 16 moles of hydrochloric acid reacted

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