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Uses, Management and Handling of Apparatus and Chemical Substances (5)
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Methods of storage of chemicals- Substances that decompose easily
Substances that decompose easily in presence of light like concentrated nitric acid, hydrogen peroxide solution, silver nitrate solution, liquid bromine & liquid chlorine are stored in dark bottles
Methods of storage of chemicals- Substances with pH<5 and pH>9
Corrosive chemicals (H<5 and pH>9) are usually stored in special storage cabinets that are kept locked
Methods of storage of chemicals- Heavy metals and toxic subtances
Toxic substances and heavy metals should be kept in special labelled containers and kept in a locked room which is heat free
Methods of disposal of laboratory wastes - hydrogen peroxide (1)
Hydrogen peroxide wastes with low concentration can be poured directly into the laboratory's sink
Methods of disposal of laboratory wastes - hydrogen peroxide (2)
Hydrogen peroxide with a high concentration has to be diluted with water & added with sodium sulphite for the decompostion process to take place before being poured into the sink
Methods of disposal of laboratory wastes - solid wastes
Solid wastes like glass and rubber have to be disposed into special containers
Methods of disposal of laboratory wastes - Organic solvents and hydrocarbons (1)
Most organic solvents & hydrocarbons are toxic, carcinogenic, volatile and inflammable
Methods of disposal of laboratory wastes - Organic solvents and hydrocarbons (2)
This type of wastes cannot be disposed directly into the sink or the laboratory drain because it would pollute the water source and the environment
Methods of disposal of laboratory wastes - Organic solvents and hydrocarbons (3)
Organic solvent and hydrocarbon wastes should be kept in special containers made of glass or plastic
Methods of disposal of laboratory wastes - Heavy metals and toxic substances (1)
Solutions containing heavy metals & toxic substances have to kept in plastic bags and the solutions be let to evaporate in the fume chamber
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