CHEM4 Flashcards
Catalysts
substances that speed up chemical reactions
Metal properties
Shiny, malleable, ductile, conductive, and sometimes magnetic
Corrosion
the reaction with oxygen at the surface of a metal
Rusting
The corrosion of iron
Sodium + water ->
Sodium hydroxide + hydrogen
Alkali metals
Group 1 elements, which are very reactive metals
Metal + acid ->
salt + hydrogen
Effervescence
Effervescence
the production of a gas from a reaction in a liquid
Accuracy
how close a measurement is to the true value
Repeating an experiment makes it more…
Reliable
Anomalous result
A result that doesn’t fit in with the pattern of the other results in a set of data.
Calcium + nitric acid ->
Calcium nitrate + hydrogen
Lithium + hydrochloric acid ->
Lithium chloride + hyrdrogen
Pure metal
A metal that does not contain any other materials
Alloy
A metal with one or more elements added to improve it’s properties.
Melting point
The temperature at which a solid becomes a liquid
metal + oxygen ->
metal oxide
what are the 3 reaction names when a metal combines with oxygen?
combustion, burning, oxidation
If the metal oxide is soluble what will it most likely be?
basic
Good conductors of heat
metal property
Good conductors of electricity
metal property
shiny
metal property
ductile
metal property
Malleable
metal property
Strong and flexible
metal property
solid with high melting points
metal property
low melting points
non-metal property
brittle (when solid)
non-metal property
Not shiny
Non-metal property
Poor conductors of heat
non-metal property
Poor conductor of electritcy
non-metal property
alkali metal + water ->
metal hydroxide + hydrogen
oxide layer
prevents further corrosion of metal, meaning it can be used for doors and windows
Conditions for rusting
water
iron + oxygen + water ->
iron oxide
metal + water ->
metal hydroxide + hydrogen
Test for hydrogen gas?
squeaky pop test (splint in tube, if presnet burns with a pop)
Reaction of metals in water from groups 1 and 2?
vigourous
Top three most reactive metals
- Potassium 2. Sodium 3. Lithium
Top three least reactive metals
- Gold 11. silver 10. copper
Metals in-between Top three most and least reactive
- Calcium 5. Magnesium 6. Alumninium 7. Zinc 8. Iron 9. Lead