Flashcards in Section 2 Deck (33):
sodium and water
-moves around surface
sodium and water equation
2Na + 2H2O --> 2NaOH + H2
lithium and water
potassium and water
-burns with a lilac flame
what happens to the elements in group 1 as their atomic number increases?
their reactivity increases
chlorine state at room temp
bromine state at room temp
iodine state at room temp
what is dissociation?
when a molecule splits up into ions
what colour is bromine in the displacement reaction?
what colour is iodine in the displacement reaction?
what would you observe when magnesium is added to a dilute acid?
-lots of bubbles
aluminium and acid
-doesnt react much with cold acid
-reacts vigorously with warm acid
-produces lots of bubbles
zinc/iron and acid
-slow reaction with cold acid
-strong reaction when you heat them up
iron + oxygen +water --> hydrated iron (3) oxide
two ways to prevent rusting:
oxygen in air
argon in air
nitrogen in air
carbon dioxide in air
how to measure the % of oxygen in the air (with iron or phosphorus)
-soak iron wool in ACETIC acid
-invert test tube in water
-measure the volume of water at the start and end of the experiment
what is used to make oxygen in the lab?
what catalyst is used to make oxygen in the lab?
magnesium burning in air
-bright white flame
-white magnesium oxide
carbon burning in air
-carbon dioxide gas is produced
sulfur burning in air
-pale blue flame
-sulfur dioxide is produced
what is used to make carbon dioxide in the lab?
equation for the production of carbon dioxide
2HCl + CaCO3 --> CaCl2 + H20 + CO2
thermal decomposition of copper carbonate:
CuCO3 --> CuO + CO2