Give the reason for the evaporation of the solution to dryness with 6 m hcl in the first procedure of the copper-arsenic group analysis. include net ionic equations for any reactions that occur.

Evaporation occurred between the reaction of the hydrochloric acid and the arsenic group because there is a formation of gas. A liquid is cooled if condensation exceeds evaporation. This is because the cooling of the liquid decreases the kinetic energy of the molecules. Their movement is being restricted by the colder temperature. The molecules tend to be closer with each other. Also, because of their restricted movement, the liquid may turn into solid due the colder temperature. An example of this is the cooling of liquid water by placing it into the refrigerator into solid water (ice).

Explanation:

ii) If the solution is slightly acidic, the universal indicater will give a yellow/orange colour.

iii) carbon dioxide in the atmosphere increases the greenhouse effect.

iv) methane is a green house gas

Its is emitted during the production and transport of coal, natural gas, and oil.

v)Electrolysis is the process by which ionic substances are decomposed (broken down) into simpler substances when an electric current is passed through them.