Y11 chemistry CC10/11 Electrolysis Equilibrium | Baamboozle - Baamboozle

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Electrolysis and Equlibrium

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#Chemistry #quiz #Electrolysis

Identify the Cations: Ca2+, SO3, NO3-, Br-, Fe3+, NO2,

Ca2+ and Fe3+

10

Which ions would be attracted to an anode: Ca2+, SO3, NO3-, Br-, Fe3+, NO2,

NO3- and Br-

15

Which of the following does not describe oxidation?

loss of hydrogen ions

loss of electrons

gain of electrons

gain of oxygen

15

In the copper sulfate electrolysis practical, what was the gas that was produced?

carbon dioxide

oxygen

nitrogen

hydrogen

15

In the copper sulfate electrolysis practical, why did you have to clean the copper electrodes?

so that the copper deposited will adhere to the electrode ( because when it is oxidized, the copper metal is not on the outside)

20

In the copper sulfate electrolysis practical, why was a variable resistor required?

the current can vary in the experiment but a variable resistor keeps it constant

20

In the copper sulfate practical, why did we use propanone to wipe the electrodes before they were weighed?

to dry them, so that the weight represents only the copper and not the water.

15

What would be the product at the anode from the electrolysis of molten sodium chloride?

anode: chlorine

15

What would be the product at the cathode from the electrolysis of molten sodium chloride?

sodium

15

Which half reaction of molten lead shows oxidation?

the anode

5

What is the ratio of hydrogen: oxygen gas volume when acidified water is oxidized

2:! hydroge: oxygen because the formula for H2O is 2 hydrogen for every 1 oxygen

15

When a sodium chloride solution is electrolysed, why is hydrogen produced instead of sodium metal?

hydrogen ions are discharged more readily than sodium ions

25

What are the products: Zn(s) + H2SO4(aq) -->

H2(g) + ZnSO4(aq)

15

What are the products: Mg(s) + H2O(aq) -->

H2(g) + MgO(s)

15

Predict products: magnesium + copper sulfate -->

copper + magnesium sulfate

15

Predict products: copper + magnesium sulfate -->

no reaction (because copper is lower on reactivity series and not reactive)

20