What would happen with non-electrolytes?
3 marks · EasyThe table gives the results for the electrical conductivity of three substances in different states:
| Substance | Solid | Molten | Aqueous |
|---|---|---|---|
| D | No | Yes | Yes |
| E | No | No | No |
| F | Yes | Yes | n/a |
Which substance is a non-electrolyte? Explain your answer.
What type of bonding does substance D have? Explain using the data.
State the bonding present in substance F.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) E; it never conducts electricity. · must show identifies E and explains
(b) Ionic; conducts when molten or aqueous, not as solid. · must show states ionic and refers to data
(c) Metallic · must show states metallic
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · E is the non-electrolyte; correct explanation.
B1 (b) · 1 mark · Identifies substance D as ionic (conducts as molten/aqueous, not solid); explanation must reference data.
B1 (c) · 1 mark · Identifies substance F bonding as metallic.
Worked solution
a) E is the non-electrolyte because it never conducts electricity in any state.
b) D is ionic because it conducts when molten or in solution but not as a solid.
c) F is metallic as it conducts in solid and molten states.