Chemistry - C5 - ammonia?

what is the method for titration

• 25cm cubed of NaOH into a conical flask

• add 5 drops of indicator

• fill the biuret up to 0.0 with acid

• slowly drip the acid into the conical flask and swirl until it changes colour

• once its changed colour measure and record the volume

what is molar gas volume

the volume occupied by 1 mole of molecules of any gas

what to calculate volume of gas

volume of gas = amount of gas x molar gas volume (24dm cubed or 24000)

what does exothermic mean

getting hotter

what is the method to make ammonia

• nitrogen and hydrogen are pumped through pipes

• pressure is increased to 200 atmospheres

• the gases are heated at 450 degrees celius and passed through a tank of iron catalyst

• the mixture is cooled and the ammonium liquifies and is removed

making nitric acid

ammonia + oxygen ——> nitric acid + water

making sulfuric acid

sulfur + oxygen —→ sulphur trioxide

sulphur trioxide + water ——> sulphuric acid

what are advantages of hydrogen-oxygen fuel cells

• water is produced

• oxygen won’t run out

• don’t need to replace a abttery

• quieter

what are the disadvantages of hydrogen-oxygen fuel cells

• must have hydrogen, but its explosive

• hydrogen is a finite resource

• expensive

• not many suitable stations