M5 Electrochemistry - true or false?

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Total cards: 18•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (18)

Front (Question)

TRUE OR FALSE? Acidified dichromate Cr2O72-/H+ is the strongest oxidising agent

Back (Answer)

FALSE Acidified manganate MnO4-/H+ has a more positive E⦵ value so is a more powerful oxidising agent

Front (Question)

TRUE OR FALSE? Zn2+ is the strongest reducting agent

Back (Answer)

FALSE Zinc metal, Zn, is oxidised so is the strongest reducing agent

Front (Question)

TRUE OR FALSE? The standard cell potential, E⦵ cell, for a cell joining systems 4 and 5 is 1.36V

Back (Answer)

TRUE E⦵ cell = E⦵ red - E⦵ ox = 1.51 - 0.15

Front (Question)

TRUE OR FALSE? The standard cell potential, E⦵cell, for a cell joining systems 1 and 3 is 0.89V

Back (Answer)

FALSE E⦵ cell = E⦵ red - E⦵ ox = 1.33 - (-0.44) = 1.77v

Front (Question)

TRUE OR FALSE? The standard cell potential, E⦵cell, for a cell joining systems 3 and 6 is 0.32V

Back (Answer)

TRUE E⦵ cell = E⦵ red - E⦵ ox = (-0.44) - (-0.76) = 0.32V

Front (Question)

TRUE OR FALSE? Zinc can reduce iron(III) ions

Back (Answer)

TRUE System 2 has a more positive E⦵ value than system 6

Front (Question)

TRUE OR FALSE? Silver ions can oxidise iron(II) ions

Back (Answer)

TRUE System 7 has a more positive E⦵ value than system 2

Front (Question)

TRUE OR FALSE? copper(II) ions can reduce bromine

Back (Answer)

FALSE System 8 has a more positive E⦵ value than system 4 so copper(I) ions can reduce bromine

Front (Question)

TRUE OR FALSE? silver reacts with bromine to form silver bromide

Back (Answer)

TRUE System 8 has a more positive E⦵ value than system 7

#10

Front (Question)

TRUE OR FALSE? iron metal can reduce silver ions

Back (Answer)

TRUE System 7 has a more positive E⦵ value than system 3

#11

Front (Question)

TRUE OR FALSE? The half-cell for system 7 has a silver electrode

Back (Answer)

TRUE Silver metal is in the redox equilibrium

#12

Front (Question)

TRUE OR FALSE? The half-cell for system 3 has an iron electrode

Back (Answer)

TRUE Iron metal is in the redox equilibrium

#13

Front (Question)

TRUE OR FALSE? The half-cell for system 2 has an iron electrode

Back (Answer)

FALSE Iron metal is not in the redox equilibrium, only iron(II) and iron(III) ions; platinum is used as the electrode

#14

Front (Question)

TRUE OR FALSE? The half-cell for system 4 has a copper electrode

Back (Answer)

FALSE Copper metal is not in the redox equilibrium, only copper(I) and copper(II) ions; platinum is used as the electrode

#15

Front (Question)

TRUE OR FALSE? The reaction in the cell made from systems 1 and 6 shows a colour change of orange to green

Back (Answer)

TRUE Zinc reduces orange dichromate ions to green chromium(III) ions

#16

Front (Question)

TRUE OR FALSE? When a cell is made from systems 2 and 3, only one product is formed

Back (Answer)

TRUE Iron metal reacts with iron(III) to produce only iron(II) ions, a disproportionation reaction

#17

Front (Question)

TRUE OR FALSE? In the reaction between manganate(VII) and iron, the equilibrium position of system 2 shifts to the left

Back (Answer)

FALSE In the reaction with iron (metal), equilibrium 3 shifts to the left. In the reaction with iron(II), equilibrium 2 shifts to the left

#18

Front (Question)

TRUE OR FALSE? The cell with the largest cell potential value is made from systems 5 and 6

Back (Answer)

TRUE System 5 has the most postitive E⦵ value and system 6 has the most negative E⦵ value