Which species will reduce Mn3+ to Mn2+ (Ecell = 1.51 V) but will NOT reduce Cr3+...
Which species will reduce Mn3+ to Mn2+ (Ecell = 1.51 V) but will NOT reduce Cr3+ to Cr2+ (Ecell = -0.40 V)? (Can you explain with steps on how to find the correct answer, and why the other answers are not correct?)
Homework Answers
Mn3+ + e- -----------------> Mn2+ Eo = 1.51 V . to get this reaction other reaction must be oxidiation . for that the reduction potential should be less than 1.51 V. so all have less than 1.51 V so that all given elements can reduce Mn3+
now Cr3+ + e- ------------------> Cr2+. , Eo = -0.40 V
which should not occur means reduction potential more than -0.40 V. Zn and Pb can reduce Cr3+ because they have lower reduction potentials but not Pb
so answer A) Pb only
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Which species will reduce Mn3+ to Mn2+ (Ecell = 1.51 V) but will
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yes no Cu
yes no PbO2
yes no No reaction
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yes no I-
yes no No reaction
yes no Cl2
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For all of the following
experiments, under standard conditions, which species could be
spontaneously produced?
A lead wire is placed in a solution containing
Cu2+
yes no Cu
yes no PbO2
yes no No reaction
Crystals of I2 are added to a solution of
NaCl.
yes no I-
yes no No reaction
yes no Cl2
A silver wire is placed in a solution containing
Cu2+
no yes Cu
no yes No reaction
no yes Ag+
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