Virtual versions of real O-Level Pure Chemistry Practical papers (6092/03 — three questions, 40 marks, 1 h 50 min). Do the experiments on the bench, but — just like the real exam — you record every observation, calculation and graph in the laboratory notebook, and it's marked like the actual paper.
Titrate ethanedioic acid to find x in C₂H₂O₄·xH₂O, collect hydrogen from Mg + acid in an inverted measuring cylinder, plot the volume–time graph, then devise your own tests to tell two acids apart.
The same titration + rates + QA paper, but you write every answer in your own words — auto-marked offline against the real mark scheme.
Time the disappearing dot as sulfur clouds the mixture — choosing your own volumes for three experiments — plot rate against volume, then analyse mineral ore C and weigh the CO₂ lost to find the percentage of copper carbonate.
The same rates + QA + planning paper, written in your own words and auto-marked against the real marking points.
Heat blue CuSO₄·xH₂O to find x, feel the heat of dissolving the white powder in a polystyrene cup, then explore manganese chemistry — six redox test-tube reactions and a potassium manganate(VII) rate graph.
The same gravimetry + manganese QA paper, with observations and calculations written in your own words and auto-marked.
Identify the three ions in Mohr's salt X, run an iodine–thiosulfate titration (add the starch at just the right moment!) to find the copper in brass, and extrapolate a temperature graph for CaCO₃ + acid.
The same QA + titration + thermochemistry paper, written in your own words and auto-marked against the real scheme.
Titrate the sulfamic acid in a descaler with sodium hydroxide, unmask the two copper fungicides R and S (Burgundy & Bordeaux mixtures), and analyse zinc + acid rate data at three temperatures.
The same titration + QA + rates paper, written in your own words and auto-marked.
Mix acid P and alkali Q in a styrofoam cup and chase the temperature peak across seven mixtures — plot the graph, find the intersection — then heat impure baking soda and identify its salty impurity.
The same thermometric + gravimetric + QA paper, written in your own words and auto-marked against the real marking points.