Question

Oxidation of copper to copper oxide.
write its
•Aim
•Principle
•Requirement
•Procedure
•Observation
•Conlution

in short plz give correct answer​

Answer 1

Answer:

In this experiment, students react an insoluble metal oxide with a dilute acid to form a soluble salt. By reacting copper(II) oxide, a black solid, with colourless dilute sulfuric acid, they produce copper(II) sulfate with a characteristic blue colour. Students can then obtain blue copper(II) sulfate pentahydrate crystals

Using the procedure below, it should take no more than 30 minutes to produce the filtered salt solution.

Experimental work can begin without delay if the dilute sulfuric acid and copper(II) oxide powder are provided in ready-measured quantities (see Health, safety and technical notes).

This procedure can be used by students. A demonstration aided by students may be more sensible if there are real doubts about safe behaviour or adequate manipulative skills.

Equipment

Apparatus

Eye protection

Glass beaker, 100 cm3

Conical flask, 100 cm3

Spatula

Glass stirring rod

Filter funnel (note 1)

Filter paper (note 2)

Bunsen burner

Tripod

Gauze

Heat resistant mat

pH or litmus paper

Apparatus notes

Polythene filter funnels are safer and cheaper than glass funnels. Filter funnel diameter is important – too large a funnel makes the filtration set-up unstable.

Filter paper size when folded should match funnel size. Student grade filter paper is adequate.

Chemicals

Dilute sulfuric acid, 0.5 M (IRRITANT), 20 cm3

Copper(II) oxide (HARMFUL, DANGEROUS FOR THE ENVIRONMENT), about 1 g

Health, safety and technical notes

Read our standard health and safety guidance.

Wear eye protection throughout.

Be very careful not to knock the tripod while the beaker is on it. Consider clamping the beaker.

When heating the copper(II) oxide and dilute sulfuric acid, avoid boiling off the water and allowing the copper sulfate to appear and then decompose with excessive heating – this is unsafe. The sulfur dioxide gases are toxic and can cause breathing difficulties.

In the final (optional) stage of the procedure, do not attempt to evaporate the acid to obtain crystals by heating with a Bunsen burner after filtering. This action would fill the lab with toxic fumes.

Provide the reagents in ready-measured quantities to reduce waste and assist lesson organisation. All containers must be clearly labelled.

Copper(II) oxide, CuO(s), (HARMFUL, DANGEROUS TO THE ENVIRONMENT) – see CLEAPSS Hazcard HC026. The copper(II) oxide powder can be provided in approximately 1 g quantities in labelled specimen tubes or plastic weighing boats.

Dilute sulfuric acid, H2 SO4 (aq), (IRRITANT at concentration used) – see CLEAPSS Hazcard HC098a. 20 cm3 of the dilute sulfuric acid should be provided in small labelled bottles.

Copper(II) sulfate, CuSO4 (s), (HARMFUL, DANGEROUS TO THE ENVIRONMENT) – see CLEAPSS Hazcard HC027c.

Procedure