chem shit Flashcards
Cite five ways in which you have used chemistry in the last week.
baking, breathing, washing dishes, cutting onions makes you cry, straightening hair
Name two “not-so-obvious” careers that require at least some knowledge about chemistry. In what way is chemistry used in these careers?
baker/flavourist (manipulates the chemicals in food for taste) and hairdresser (mixing hair dyes and toners)
What is a chemical reaction? How might you tell that a chemical reaction has occurred?
Process in which atoms of one or more substances are rearranged to form
different substances – new substance is formed (colour change, change of state,
heat released, etc.
Why shouldn’t you flush old medications down the toilet?
a. Chemicals can get into the water ways and fish/aquatic species can consume these and die
What is the difference between WHMIS labels and SDSs? Why are these documents important?
WHMIS symbols inform what types of hazards are associated with a chemical;
SDS provide more detailed information about how to properly handle, store and dispose of chemicals, also contain
the physical and chemical properties of
materials, their hazards and how to treat people when an accident occurs
What is your favourite WHMIS symbol? What does it look like?
skull and crossbones = death
Describe how to properly heat a test tube.
Using test tube holders, slowly bring it back and forth in the flame (do not hold it right over top of the flame)
What three pieces of safety equipment should you wear for every experiment?
Lab coat, goggles, gloves
What are ionic compounds composed of?
METAL AND NON METAL
Distinguish between ionic and covalent bonds. Give examples of compounds that contain each of these.
Ionic bonds transfer electrons (NaI); covalent bonds share electrons (CO2)
What is a lattice structure?
Arrangement of a solid chemical where the order is a positive ion followed by a
negative ion
Distinguish between single, double and triple bonds.
Single bond shares a pair of electrons, double bond shares two pairs of electrons, triple bonds share three pairs of electrons
What is a molecule?
A particle made up of two or more atoms bonded by covalent bonds
What are the diatomic elements?
Hydrogen (H₂)
Nitrogen (N₂)
Oxygen (O₂)
Fluorine (F₂)
Chlorine (Cl₂)
Iodine (I₂)
Bromine (Br₂)
In their natural forms, these elements exist as molecules, and each molecule consists of two atoms of the same element bonded together.
In what forms are sulphur and phosphorus found in
nature?
a. O2, N2, I2, Cl2, H2, F2, Cl2
b. S8 and P4
