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write a balanced reaction
help plz!! its a matter of life and death !!! ...i need to solve it within today ..so plzz dont go plzzzzzzz
there is no given equation
you have to write it yourself
okay i'll try
PCl_5 ---> PCl_3 + Cl_2
^is this correct??
yep, thats good, now write an equilibrium expression
A -> B + C K = [B][C]/[A]
products over reactants
yes i know that
i guess these expressions are for reversible reactions ??
K = [PCl_3][Cl_2] / [PCl_5]
yeah, if you have an equilibrium the reaction is reversible
okay, now with the reaction you wrote: PCl_5 ---> PCl_3 + Cl_2 make an I.C.E. table
now what to do ? ...i have solved this equilibrium expression problems ...but this one is out of my mind
what is I.C.E table ?
concentrations of species at initial, change, equilibrium
to find the initial amount of PCl5 you have to use PV=nRT
oh wait no you don't
yeah 0.1 is right
i guess we have to suppose it as x and then we have to solve a quadratic
yes you do
so is it x or 0.1 ?
well the change is x, the initial conc is 0.1
yep, thats PCl5, what about the rest?
there was nothing mentioned to PCl_3 and Cl_2 ...how to find that ?
well if you subtract x from PCl5, you get x Cl2 and x PCl3, right?
PCl_5 ---> PCl_3 + Cl_2 I 0.1 0 0 C -x +x +x E 0.1 -x x x K = x^2/(0.1-x) right?
wait let me solvve now
this is giving complicated answer
my equation is x^2+0.041x-0.0041=0
looks good, try it, heres the answer http://www.wolframalpha.com/input/?i=0.041+%3D+x%5E2%2F%280.1-x%29
the answer is coming wrong
you're probably not solving the quadratic correctly
no i mean the answer in wolframalpha is wrong...it is a different anser for x
it's not 0.047 ?
^this should come
hm even if you use the initial 1 mole PCl5, Cl2 = 0.18 moles
(1-2x)/10 --- > x/10 + x/10
^is this true
this gives x=0.35
no, it would only be 1 x not 2x because 1 PCl5 breaks apart into Cl2 and PCl3
what book are you using?
i asked a friend of mine
^this is the moles of CL_2 ?
hahaha .. um well i can tell you that the equilibrium expression is K = x^2/(0.1-x)
number 1 http://darlenewall.ca/grade12/Answers_Equilibrium_Problems.pdf number 5 https://mymission.lamission.edu/userdata%5Cpaziras%5CChem102%5CReview_14ANS.pdf