Chemistry Equilibrium A2 Help!!! Watch

fallingdown
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#1
Report Thread starter 4 years ago
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I'm having lots of difficulty calculating equilibrium concentration from moles
I was hoping someone could help me with this question

i dont understand the steps i have to do- anyhelp asap would be great
lol, sorry about the picture being so big :O
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username1445490
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You need another row that is called 'change'



If there are 0.5 of Z at the start and 0.7 at equilibrium then the change is +0.2

You then use the ratio from the equation to work out the other changes.

X and Z are 2:1 ratio so X must change by double what Z did and so it is -0.4 which leaves 0.6 at equilibrium
Y and Z are 1:1 so Y must go down by the same as Z which is -0.2

To get the concentration you divide by the volume which is 4.
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fallingdown
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Thank you so much for the help! I sit in lessons not understanding what the teacher is saying, while everyone is ahead of me in class since they taught themselves. The textbook doesn't mention any of this
Thank you again, and good luck with future studies!! xxx
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username1445490
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If you put the 'change' row in and make sure the numbers in there have the same ratio as the equation it is pretty straight forward.
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