Le Chatelier's Principle states that when a system at equilibrium issubjected to a stress,thesystem will shift its equilibrium point in order to relieve the stress.

Complete the following chart by writing left, right or none for equilibrium shift, anddecreases, increases or remains the same for the concentrations of reactants andproducts, and for the value of K.

N2(g) +. 3H2(g) ~ 2NH3(g) + 22.0 kcal

I

fLECHATELIER'S PRINCIPLE Name ---------

Stress

Equilibrium

[N2l[H2l[NH3lKShift

,Add N2

remains the1. right

-decreasesincreasessame. ~2,

Add H2

3,

Add NH3

4.

Remove N2

5.

Remove H2

6.

Remove NH3f

7.

IncreaseTemperature

8.

DecreaseTemperature

,

9.

IncreasePressure

~

10. DecreasePressure

Chemistry IF8766 81 ©Instructional Fair. Inc.

LE CHATELIER'S PRINCIPLECONTINUED

Name _

12.6kcal + H/g) + 12(g) ~ 2HI(g)

StressEquilibrium[H2]

[12][HI]KShift

1.

Add H2 right decreasesincreasesremains the

same2.

Add 12

3.

Add HI

4.

RemoveH2

5.

Remove'2

6.

Remove HI

7.

Increase

Temperature8.

Decrease

Temperature9.

IncreasePressure

10.

DecreasePressure

NaOH(s) ~Na+(aq) + OH-(aq) + 10.6kcal(Remember that pure solids and liquids

do not affect equilibrium values,)

Stress

EquilibriumAmount[Na+][OH-]KShift NaOH(s)

1.

Add NaOH(s)

2,

Add NaCi

(Adds Na+)-

3.Add KOH

(Adds OH-)4,

Add H+

(Removes OH-)5,

Increase

Temperature6.

Decrease

Temperrture7.

Increase Pressure

8,

Decrease Pressure

Chemistry IF8766 82 ©Instructional Fair, Inc.

LE CHATELIER'S PRINCIPLE Name _

Le Chatelier's Principle states that when a system at equilibrium is subjected to a stress, thesystem will shift its equilibrium point in order to relieve the stress.

Complete the following chart by writing left, right or none for equilibrium shift, anddecreases, increases or remains the same for the concentrations of reactants andproducts, and for the value of K,

N2(g) +. 3H2(g) ~ 2NH3(g) + 22.0 kcal

Stress

Equilibrium

[N2][H2][NH3]KShift

1.

Add N2remains the

right

-decreasesincreasessame~

2.Add H2 r/~ktJ. e c T'ea.~e5 illcre.a5SSCLi'Vle.

/eJ;i-

,,3, Add NH3 /11 C r,t.."rJ G!'-, Sam.eJ

/ e +-t

\

de Cr',4. Remove N2 (,11 Cr.Sa J'l'1. e...

I

Jeef'.5. Remove H2 I e -ft-L 11 C r-, Same

6,

Remove NH3r/jAtjee,.dee, SO-m€-

7.

IncreaseIe ·9t

.'"

d e.c,dee.Temperature

L 11 cf'.LYI Cf'.

8.

Decrease

r-13~tdee.lee.\

'" ?11 C ,Temperature011 C ,

9.

Increase

r 13 Aide-c,dee..

Pressure6rLC,Sa rvze-

~

.jec.10.

DecreaseIe-fi-~

Sa..m~(IlC I0/1 C.

Pressure

Chemistry IF8766 81 ©Instructional Fair. Inc.

LECHATELIER'S PRINCIPLECONTINUED

Name _

12.6 kcal + H2(g) + 12 (g) ~ 2HI(g)

StressEquilibrium

[H2][12][HI]K

Shift

1.

Add H2 right decreasesincreasesremains thesame

2.Add 12 ({'l1ktDe.e... J:ne-Sa..r'Yle- J:ftC

3. Add HI Left J:-1lC.Sa..yne4.

Remove H2 Le- f-t J--rfe-DuSet... y'Yl e5.

Remove 12 L-e-0tr nc- De-e-Set.. f'Yte..

6.

Remove HI j(,~ ~tDee-Dee Sq,;'Y'\e

7.

Increase

f(l(jht{)ee-/)e..cJ:.-1'tC--:r;- ne-Temperature

8.

DecreaseLe(;t:;: (lCr~C-D e-c.DeeTemperature

9.

IncreaseAJ~neSCCfY'e.~~€..se.t ;'Y\.e..$Q.filePressure

10,

DecreaseIV tJt1.e5QI'Yte....Sa-m.ega..;')'l€...~CLhle..Pressure

NaOH(s) ~. Na+(aq) + OH-(aq) + 10.6 kcal(Remember that pure solids and liquids

do not affect equilibrium values,)

Stress

EquilibriumAmount[Na+][OH-]KShift NaOH(s)

1.

Add NaOH(s) /IItl/l e 5c~_YYl e...So-.rYle.SCA rv"\e2.

Add NaelI-e-f-i:

.-De-cSaV>1e(Adds Na+)

J-/tC-

3.

Add KOHLef-tf/tc-IJ ec. Sa.~e(Adds OH-)

4.

Add H+

I< '9 AtDe-G;; I1C So.. VVLe(Removes OH-)5.

Increase

f{ 'Sh-/:;J:/lCD e.c,Oe.c!Je.e-Temperature6,

Decrease

I< ICJlt-tDee:J-11C-J:-/1C]:.tlC/Temper~ture7,

Increase PressureN&l1eSa..~5 ctJY\ e..-5 (AW\€.5a..V"'te

8,

Decrease PressureAi ~rze-5CLM~Sa.W'"1eS D.yYleSft-n1e.

Chemistry IF8766 82 ©Instructional Fair, Inc,