Chem 1128 EXAM VERIFIED SOLUTIONS, SCORED A+ (2025).

Chem 1128 EXAM VERIFIED SOLUTIONS,
SCORED A+ (2025)




Assume .that .the .following .chemical .reaction .is .at .equilibrium. .

2ICl(g)--->I2(g)+Cl2(g) .=+26.9 .kj

a)K .will .increase .and .the .reaction .will .go .backwards .
b)K .will .increase .and .the .reaction .will .go .forward
c) .K .will .decrease .and .the .reaction .will .go .backward .
d) .K .will .decrease .and .the .reaction .will .go .forward .- .CORRECT .ANSWER-c

If .the .value .of .Q .is .greater .than .K, .then

a) .The .reaction .will .go .left .till .equilibrium .
b) .The .reaction .will .go .right .till .equilibrium .
c)The .reaction .will .go .left .or .right .until .equilibrium .
d) .The .system .is .in .equilibrium .- .CORRECT .ANSWER-a

The .formation .of .ammonia .from .elemental .nitrogen .and .hydrogen .is .an
.exothermic .process.


N2(g)+3H2(g)--->2NH3(g) .= .-92.2KJ

assuming .the .reaction .is .at .equilibrium, .which .one .of .the .following .changes
.will .drive .the .reaction .to .the .left?


a) .Adding .hydrogen .gas .
b)Adding .a .catalyst .
c) .compress .the .volume .to .half .
d) .increasing .the .temperature .- .CORRECT .ANSWER-d

Which .of .the .following .statements .is .CORRECT .for .the .following .system .at
.equilibrium? .



H2(g)+F2(g)---->2HF(g)


a) .Addition .of .catalyst .will .cause .the .reaction .to .proceed .in .forward .direction

, b)Increasing .pressure .of .system .will .cause .the .reaction .to .the .forward .direction
.
c) .The .partial .pressure .of .HF(g) .will .decrease .when .HF(g) .added .
d) .The .partial .pressure .of .H2(g) .will .increase .if .HF(g) .added .- .CORRECT
.ANSWER-d


Assuming .the .reaction .below .is .at .equilibrium .which .of .the .following .changes
.will .drive .the .reaction .to .the .left? .


Co2(g)--->C(s)+O2(g) .= .+395.5 .kJ


1. .Decreasing .the .temperature .
2. .Adding .Co2
3. .Adding .C .- .CORRECT .ANSWER-1

All .of .the .following .species .are .amphiprotic .EXCEPT .



a. .H20
b.Po43-
c.H2PO4-
d.HPO42- .- .CORRECT .ANSWER-b

What .is .conjugate .acid .of .[Al(H20)5OH]^2+


a. .[Al(H20)5]^3+
b.[Al(H20)5H3O]^4+
c.[Al(H20)6]^3+
d. .H3O+ .- .CORRECT .ANSWER-c

Which .of .the .following .reactions .are .acid-base .reactions .according .to
.Bronstead .Lowry .model? .



1. .NH4+ .+ .H2O .--->NH3+H3O+
2.HF+NH3--->F-+NH4+
3.PO43-+H3O+--->HPO42-+H20 .- .CORRECT .ANSWER-d

Which .of .the .following .chemical .equations .corresponds .to .Ka2 .for .H2SO3


a. .H2SO3-->HSO3-+H+
b. .SO32-+H3O+--->HSO3-+H2O
c.HSO3---->SO32-+H+
d. .SO32-+H2O--->HSO3-+OH- .- .CORRECT .ANSWER-c