WEAKNESSES - practicals + mistakes

why do you need to relight the hydrogen immediately if it goes out?

to prevent hydrogen from escaping which is flammable and could cause an explosion.

what colour is copper carbonate?

green

what colour is copper oxide?

black

what are short chain alkenes used to make?

polymers

why is ethane considered a saturated compound?

• made of single carbon-carbon bonds only

• no other atoms can be added

• no addition reactions

how to collect gas in electrolysis

• fill measuring cylinder with solution/water

• place over electrode

• collect the gas by displacement of the water/solution

how to test for carboxylic acids

• add metal/carbonate

• effervescence

definition of dynamic equilibrium

• rate of the forward reaction is equal to the rate of the reverse reaction

• the concentration of the reactants and products remains constant

ethanol molecular formula

C2H6O

isotope definition

atoms with the same number of protons but different number of neutrons

compound definition

atoms of two different elements chemically bonded together

why does it take a while for the ammonium chloride ring to form

gases move in random directions and collide with the walls and themselves

why does solid sodium oxide not conduct electricity

• ions fixed in the lattice and cannot move

• no delocalised electrons

what is the colour of silver chloride

white precipitate

advantage of mixing solutions containing the same amount of moles

make sure they fully react

highest possible yield

problems caused by the disposal of addition polymers

• toxic gases when burned

• lack of space in landfill sites