Can someone please help me doing this problem step by step please Blackboard Boo
ID: 491540 • Letter: C
Question
Can someone please help me doing this problem step by step please Blackboard Books!!!! 3 Principles of Biology f YouTube Facebook My courses Quest Print calculator Periodic Table Question 17 of 21 General Chemistry 4th Edition University Science Books presented by Sapling Leaming Phosphorus pentachloride decomposes according to the chemical equation PCI R) Cl, Ke-1.80 at 250° C A 0338 mol sample of PCI50g is injected into an empty 4,70 reaction vessel held at 250 "c, Calculate the concentrations of PCIslg) and PCI3(g) at equilibrium. M PCIExplanation / Answer
PCl5(g)<--------->PCl3(g)+Cl2(g)
0.338mol. 0. 0
(0.338-x). x. x. (At equilibrium)
Kc at 250°C=1.80
Kc = [PCl3][Cl2]/[PCl5]
1.80= x^2/(0.338-x)
x^2+1.8x-0.60=0
x= -B+/-b^2-4ac/4a
Compare the equation with
ax^2+bx+c=0
a=1;b= 1.8;c=-0.6
x=-5
No.of moles of PCl5=(0.338+5)=5.338moles
Concentration of PCl5=5.338/4.70=1.135M
No. Of moles of PCl3= 5mole
Concentration of PCl3=5/4.70=1.06M