# electrolysis

- Created by: emily branderson
- Created on: 17-02-21 19:51

Which gas is produced at the anode

A1.1) chlorine

Q1.2) Copper is produced at the negative electrode. What does this tell you about the reactivity of copper?

A1.2) Copper is less reactive than hydrogen.

Q1.3) Determine the mean mass of copper produced after 3 minutes.

A1.3) 1.80 (Possible error interval)

Q1.4) Calculate the mass X of copper produced in Experiment 2 after 5 minutes.

A1.4) 3.06=(3.01+3.02+X)/(3)

Rearrange to 3*3.06=9.18

9.18-6.03=X

X=3.15

Q1.5) The copper chloride solution used in the investigation contained 300 grams per dm^(3) of solid CuCl2 dissolved in 1 dm^(3) of water.

The student used 50 cm^3 of copper chloride soloution in each experiment.

Calculate the mass of solid copper chloride used in each experiment.

A1.5) No of moles/(concentration * Volume)

mass/ (Concentration*volume)

Convert 50 cm^3 to dm^3 = 50/1000=0.05

0.05*300=15g

Q2.1) State one difference and one similarity in the electronic structure of sodium and of chlorine.

A2.1) Difference: Sodium only has…

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