Experiments you actually do.

The experiments from class, at a bench you can work. Every gesture is yours, every reading is real, and a tutor asks you what you observe before you move on.

Chemistry · Titration

Titration of a vinegar with a pH meter

Titrate diluted vinegar with sodium hydroxide at the bench: fill the burette, read the meter, find the equivalence and see the indicator turn.

Open the experiment6 steps

• Chemistry · Titration

  Titration of a vinegar with an indicator

  No meter this time: phenolphthalein, a burette of sodium hydroxide, and the exact drop where the beaker stays pink. Find the equivalence with your eyes.

  11 stepsOpen the experiment
• Chemistry · Titration

  Conductimetric titration of a saline solution

  Check the label of a saline solution: titrate its chloride with silver nitrate and read the equivalence where the two conductivity lines meet.

  13 stepsOpen the experiment
• Chemistry · Synthesis

  Making soap: saponification of an oil

  Cook olive oil with sodium hydroxide under reflux, salt the soap out of the brine and filter it: the synthesis every kitchen soap starts from.

  15 stepsOpen the experiment
• Physics · Electricity

  Charging and discharging a capacitor

  Charge a capacitor through a resistor, read the curve on the oscilloscope, measure the time constant with the cursor and size a flash circuit.

  18 stepsOpen the experiment
• Biology · Metabolism

  Yeast respiration and fermentation

  Follow the oxygen a yeast suspension consumes, measure its respiration rate with the cursors, and watch what the cells do once the oxygen runs out.

  13 stepsOpen the experiment
• Biology · Cell division

  Mitosis in an onion root

  Prepare a root tip, set up the microscope, recognise and count the phases of mitosis, then test a suspect water with the same protocol.

  22 stepsOpen the experiment