Unit Test — Unit test Answers
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Which statement best describes the pH of pure water?
A
It is neutral because the concentration of hydronium ions equals that of hydroxide ions.B
It is neutral because the pure liquid contains neither hydronium ions nor hydroxide ions.C
It is acidic because it has a hydronium ion concentration of .
D
It is basic because it has a hydroxide ion concentration of .
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Which is a property of acids in aqueous solutions?
A
They feel soapy.B
They taste bitter.C
They increase the concentration of H+ ions.D
They decrease the concentration of H+ ions.43
Which best describes the definition of Lewis acids and bases?
A
a general definition based on electron structureB
a general definition based on hydrogen ion concentrationC
a specific definition based on a compound’s ability to accept protonsD
a specific definition based on a compound’s ability to donate protons44
What is the definition of a Lewis acid?
A
a substance that accepts electrons to form a covalent bondB
a substance that donates electrons to form a covalent bondC
a substance that accepts a protonD
a substance that donates a proton45
Which of these acids occurs naturally in the body and performs important regulatory functions?
A
carbonic acidB
acetic acidC
magnesium hydroxideD
sodium hydroxide46
What is a base used in deodorants?
A
sorbitolB
carrageenanC
magnesium hydroxideD
sodium lauryl sulfate47
Which statement describes the Arrhenius interpretation of acids and bases?
A
It has a wider range of applications than the Bronsted-Lowry interpretation.B
It has a wider range of applications than the Lewis and Bronsted-Lowry interpretations.C
It is used in situations that involve bases that do not produce hydroxide ions.D
It is limited to situations that involve aqueous solutions or specific compounds.48
What is the Arrhenius definition of an acid?
A
A substance that increases H3O+ concentration when it is dissolved in water.B
A substance that increases OH– concentration when it is dissolved in water.C
A compound that donates protons.D
A compound that accepts protons.49
Consider the reaction below.HI + H2O H3O+ + I–Which is an acid-conjugate base pair?
A
HI and H2OB
H2O and H3O+C
H3O+ and I–D
HI and I–Did you find these answers helpful?
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