GCSE Edexcel Chemistry Reactivity of metals: 7 Many metals corrode.

(a) When

Question

7 Many metals corrode.

(a) When a metal corrodes

A  the metal reacts with nitrogen
B  the metal reacts with another metal
C  the metal element decomposes
D  the metal is oxidised

(b) An experiment is carried out to see if magnesium ribbon wrapped around a piece of iron rod has an effect on the rate at which the iron rod rusts.

The apparatus is shown in Figure 4.

Figure 4

The method used is:
- an iron rod, with magnesium ribbon wrapped around it, is placed in a boiling tube labelled A
- 10 cm³ water from a measuring cylinder is poured into this boiling tube
- an identical rod with no magnesium ribbon wrapped around it is placed in a second boiling tube labelled B
- 10 cm³ water from a measuring cylinder is poured into this boiling tube.

Both boiling tubes are left for a few days.

(i) Explain why iron rod rather than stainless steel rod is used in this experiment.

7 Many metals corrode - Edexcel - GCSE Chemistry - Question 7 - 2019 - Paper 1

Worked Solution & Example Answer:7 Many metals corrode - Edexcel - GCSE Chemistry - Question 7 - 2019 - Paper 1

Explain why iron rod rather than stainless steel rod is used in this experiment.

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