Crowdly

In part A of this experiment (corrosion), how is oxidation of iron (Fe) detected?

The presence of bubbles in the test tube indicates a site where oxidation of Fe is occurring.

A pink colour in the test tube indicates a site where oxidation of Fe is occurring.

A blue colour in the test tube indicates a site where oxidation of Fe is occurring.

There is no way to detect oxidation of Fe in this experiment.

In this chemical reaction, what is the oxidising agent?

Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)

Zn²⁺(aq)

Cu(s)

Zn(s)

Cu²⁺(aq)

Which of the following are examples of reduction processes? Only tick reduction processes, ticking other answers will result in a lower mark.

Al(s) → Al³⁺(aq) + 3e^–

Al³⁺(aq) + 3e^– → Al(s)

Fe(s) → Fe²⁺(aq) + 2e^–

O₂(aq) + 2H₂O(l) + 4e^– → 4OH^-(aq)

H₂O(l) → H⁺(aq) + OH^– (aq)

If you are absent from a laboratory class what should you do?

Request registration for a make-up lab in the Moodle course administration forum.

Mail the course coordinator.

Mail your demonstrator.

What is the required attendance at chemistry laboratory classes?

Students must attend all laboratory classes.

Students must attend at least 3 lab classes.

There is no requirement to attend lab classes.

Students must attend at least 50% of the scheduled lab classes.

What is the top priority in lab classes?

To submit your report.

To record observations professionally.

To work safely.

To leave your locker clean.

To complete the experiment.

Specifically labelled disposal container for chemical waste in the fume cupboard.

Where do you discard the mixture of nails and gel at the end of the experiment?

Broken glass container.

Laboratory sink.

Domestic waste container.

In part B of this experiment (reactions of metals with hydrochloric acid), how is reduction of H⁺ detected?

A pink colour in the test tube indicates a site where reduction of H⁺ is occurring.

The presence of bubbles in the test tube indicates a site where reduction of H⁺ is occurring.

A blue colour in the test tube indicates a site where reduction of H⁺ is occurring.

There is no way to detect reduction of H⁺ in this experiment.

In part A of this experiment (corrosion), how is reduction of oxygen (O₂) detected?

A blue colour in the test tube indicates a site where reduction of O₂ is occurring.

A pink colour in the test tube indicates a site where reduction of O₂ is occurring.

The presence of bubbles in the test tube indicates a site where reduction of O₂ is occurring.

There is no way to detect reduction of O₂ in this experiment.