Exam (elaborations)
Chapter 21 ALEKS Questions and Answers Fully Solved
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Exam of 8 pages for the course ALEKS at ALEKS (Chapter 21 ALEKS)
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Chapter 21 ALEKSCa+I2=CaI2 - answerCa=Ca^2+ + 2e^-
I2+ 2e^- = 2I^-
Write a balanced half-reaction for the oxidation of manganese ion Mn2+ to solid
manganese dioxide MnO2 in basic aqueous solution. Be sure to add physical state
symbols where appropriate. - answerMn^2+(aq)+4OH^-(aq)=MnO2(s)+2H2O(l)+2e^-
Write a balanced half-reaction for the reduction of nitrate ion NO−3 to gaseous nitric
oxide NO in basic aqueous solution. Be sure to add physical state symbols where
appropriate. - answerNO3^-(aq)+2H2O(l)+3e^-=NO(g)+4OH^-(aq)
Write a balanced half-reaction for the oxidation of gaseous nitric oxide
NO
to aqueous nitrous acid
HNO2
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answerNO(g)+OH^-(aq)=HNO2(aq)+e^-
Write a balanced half-reaction for the oxidation of solid iodine dioxide
IO2
to iodate ion
IO−3
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answerIO2(s)+2OH^-(aq)=IO3^-(aq)+H2O(l)+e^-
Write a balanced half-reaction for the reduction of gaseous nitrogen
N2
to aqueous hydrazine
N2H4
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answerN2(g)+4H2O(l)+4e^-=N2H4(aq)+4OH^-(aq)
Write a balanced half-reaction for the oxidation of gaseous arsine AsH3 to aqueous
arsenic acid H3AsO4 in basic aqueous solution. Be sure to add physical state symbols
where appropriate. - answerAsH3(g)+8OH^-(aq)=H3AsO4(aq)+ 4H2O(l)+8e^-
Write a balanced half-reaction for the reduction of permanganate ion MnO−4 to
manganese ion Mn2+ in basic aqueous solution. Be sure to add physical state symbols
where appropriate. - answerMnO4^-(aq)+4H2O(l)+5e^-=Mn^2+(aq)+8OH^-(aq)
, Write a balanced half-reaction for the reduction of gaseous oxygen O2 to liquid water
H2O in basic aqueous solution. Be sure to add physical state symbols where
appropriate. - answerO2(g)+2H2O(l)+4e^-=4OH^-(aq)
Write a balanced half-reaction for the oxidation of aqueous hydrogen peroxide
H2O2
to gaseous oxygen
O2
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answerH2O2(aq)+2OH^-(aq)=O2(g)+2H2O(l)+
2e^-
Write a balanced half-reaction for the reduction of aqueous hydrogen peroxide H2O2 to
liquid water H2O in basic aqueous solution. Be sure to add physical state symbols
where appropriate. - answerH2O2(aq)+2e^-=2OH^-(aq)
Write a balanced half-reaction for the oxidation of chromium ion
Cr3+
to dichromate ion
Cr2O2−7
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answer2Cr^+(aq)+14OH^-(aq)=CrO7^2-(aq)+7H2O(l)+6e^-
Write a balanced half-reaction for the reduction of nitrate ion
NO−3
to gaseous nitrogen dioxide
NO2
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answerNO3^-(aq)+H2O(l)+e^-=NO2(g)+2OH^-(aq)
Write a balanced half-reaction for the oxidation of solid manganese dioxide
MnO2
to permanganate ion
MnO−4
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answerMnO2(s)+4OH^-(aq)=MnO4^-(aq)+2H2O(l)+3e^-
Write a balanced half-reaction for the reduction of aqueous nitrous acid
HNO2
to gaseous nitric oxide
NO
in basic aqueous solution. Be sure to add physical state symbols where appropriate. -
answerHNO2(aq)+e^-=NO(g)+OH^-(aq)
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