SLE133 Lecture 10: Chapter 10 sample question

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greenprairie-dog776

11 May 2018

School

Deakin University

Department

Science, Engineering and Built Environment

Course

SLE133

Professor

Annie Teo

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DiplomaofHealthSciences

DiplomaofScience

SLE133ChemistryinOurWorld

SLE133CHEMISTRYINOURWORLDSAMPLEQUESTIONS2018 Page23of25

Q10Acidsandbases[2+2+2+2+4+3=15marks]

a)LabeltheBrønsted‐Lowryacidsandbasesinthefollowingequation,thenidentifythe

conjugateacid‐basepairsbyjoiningthemwithalineasdoneinyourtextbook.

 [2marks]



HSO4

–(aq)+HS–(aq) SO4

2–(aq)+H2S(aq)



b)i)Whatarethetwocomponentsofabuffersystem?

ii)ExplainhowabufferworkstoholdpHnearlyconstant.

[2marks]

i)



ii)



c)ThepHofapricotnectarwasfoundtobe3.80at25°C.

i)Calculatethe[H3O+]oftheapricotnectar.

 [1mark]



c)ii)Calculatethe[OH–]oftheapricotnectar.

 [1mark]





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SLE133 Lecture 10: Chapter 10 sample question

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