Introduction To Chemistry Flashcards
What Is Chemistry?
Field of science that studies the structures, properties, compositions and interactions between matters
Chemicals used in food
Preservatives
Colouring
Flavouring
Chemicals used in medicine
Antibiotic
Antiseptic
Vitamin
Chemicals used in agriculture
Herbicide
Pesticide
Fertiliser
Chemicals used in industries
Paint
Glass
Ceramic
Example of career fields related to chermistry
Biotechnology
Pharmaceutical
Nanotechnology
Cosmetics
Green Technology
Examples of careers in chemistry
Pg 7 textbook
What are the steps to the scientific method?
Pg 9 textbook
How are reactive metals stored?
Stored in paraffin oil to prevent reaction with the moisture in the air
Why is paraffin oil used to store reactants?
It is a mineral oil and does not evaporate over time. It also cuts off access to the moisture in the air
How are hydrocarbons and organic solvents which are volatile and inflammable stored?
Stored in shady areas far away from heat sources / sun
How are substances that are decomposed
easily in the presence of lightstored?
Stored in dark bottles
Examples of substances that are dissolved easily?
Liquid bromine, liquid chlorine
How are chenicals with pH value under 5 or more than 9 (corrosive) substances stored?
In special storage cabinets which are locked
How are heavy metals and toxic substances stored?
Kept in special labelled containers in a locked room which is heat free
How to dispose hydrogen peroxide?
Hydrogen peroxide with a low concentration rate can be poured directly into the sink.
Hydrogen peroxide with a high concentration has to be dilluted with water and sodium sulphite before being poured
How to dispose solid waste?
Into special containers
How to dispose organic solvents and hydrocarbons ( volatile / inflammable liquids )
Kept in special containers made from glass or plastic
How to dispose substances with a pH value lower than 5 or more than 9?
Kept in closed labelled containers during disposal
Why cant strong acids/strong alkali be disposed into the sink?
Can cause damage by reacting with water to release high heat or toxic gases
How to dispose heavy metals and toxic substances?
Kept in a plastic bag and left to evaporate in the fume chamber.
How to dispose volatile substances?
Kept in closed containers and kept away from sun and heat
