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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: smennyjith on May 07, 2006, 07:36:52 PM

Title: Chemical Equilibriums
Post by: smennyjith on May 07, 2006, 07:36:52 PM

SO₂ + NO₂ <-- -->(equilibrium) SO₂ + NO  (all are gasses)
if at equilibrium, how many moles of SO₂  would have to be added to increase SO₃  to 2.8 mol/L
Original equilibrium concentrations are  0.7, 2.5, 5.2, 6.4 respectively.  All i really need to know is how to go about doing this question

Title: Re: Chemical Equilibriums
Post by: Borek on May 08, 2006, 02:30:01 AM

Calculate equilibrium constant first.

Title: Re: Chemical Equilibriums
Post by: AWK on May 08, 2006, 02:34:29 AM

Of course, reaction should be:
SO2 + NO2 <-- -->(equilibrium) SO3 + NO  (all are gasses)

Title: Re: Chemical Equilibriums
Post by: Borek on May 08, 2006, 02:52:56 AM

Yeah, it could be my mistake, I was correcting formatting of the post and have some nasty accident invlolving coffe, milk, keyboard and pajama ;)

Title: Re: Chemical Equilibriums
Post by: Albert on May 08, 2006, 01:22:21 PM

Quote

if at equilibrium, how many moles of SO2  would have to be added to increase SO3  to 2.8 mol/L
Original equilibrium concentrations are  0.7, 2.5, 5.2, 6.4 respectively.

 ???

What is the initial concentration of SO₃?

Title: Re: Chemical Equilibriums
Post by: Donaldson Tan on May 08, 2006, 05:07:17 PM

Use the initial concentrations to find the value of the equilibrium constant

Next, use the ICE Method (http://www.chemicalforums.com/index.php?topic=6627.0) to find the amount of SO₂ needed.

Title: Re: Chemical Equilibriums
Post by: Albert on May 08, 2006, 05:14:09 PM

http://www.chemicalforums.com/index.php?topic=8488.0

 ;)