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3 years ago

NEED HELP 14 points!!!

Chemistry

1 answer:

evablogger [386]3 years ago

5 0

Answer: 45 moles H2O

Explanation: To solve for the moles of H2O in the reaction we will use the mole ratio of O2 and H2O based from the chemical equation which is 1 : 2

22.5 moles O2 x 2 moles H2O / 1 mole O2

= 45 moles H2O

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a) The element Cr with negative reduction potential will lose electrons undergo oxidation and thus act as anode.The element Au with positive reduction potential will gain electrons undergo reduction and thus acts as cathode.

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At anode: $Cr\rightarrow Cr^{3+}+3e^-$

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c) Overall balanced equation:

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At anode: $Cr\rightarrow Cr^{3+}+3e^-$ (2)

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$Au^{3+}+Cr\rightarrow Au+Cr^{3+}$

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