section 2 Flashcards
also includes naming ionic and molecular compounds, and using a solubility table
2.3
properties of ionic compounds
think tablesalt
what is th DIFINITIVE PROPERTY
- crystalline solid at room temp
- high MP and BP
- retail crystal shape when broken
- most are soluble in water
- when in water, will conduct electricity
when dissolved in water, will conduct electricity
2.3
electrolyte
solution that conducts electricity
2.3
solubility of ionic compounds
all are soluble in water to some extent, but some solubility is so low that they form precipitates anyway
not soluble = solid/precipitate formed
soluble = aqueoud solution formed
2.3
what is used to disover solubility?
solubility table
tip to use: start at the back of the compound
properties of molecular compounds
- solid/gas/liquid at room temp
- low MP + BP in general
- will crumble easily when broken
- only some are soluble in water
- do not conduct electricity when dissolved in water
molecular compounds
- what are they made up of
- how strong is attraction [inside and out]
- made up of molecules [nonmetals held by covalent bonds]
- attraction inside is strong
- attraction outside is weak; hence the low MP and BP
2.4
acid properties
- reacts with metals
- conductive
- taste sour
- feel non slippery
pH 0-7
base properties
- tends not to react with metals
- conductive
- taste bitter
- feel slippery
pH 7-14
what are indicators?
substance that changes colour in different pH
litmus paper:
Base: Blue
aciD: reD
2.5
what is CFCs
Chlorofluorocarbons (CFCs) are non-toxic, non-flammable chemicals used mainly in cooling systems.
2.5
hazardous effects of CFC
contain chlorine, which acts as a catalyst in the upper atmosphere and causes the destruction of Earth’s ozone layer.
2.5
main effect of nicotine on the body?
its highly addictive nature, leading to the release of dopamine in the brain
