Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 8 zadań z tego arkusza, razem 25 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Experimental techniques and apparatus (4), Molar concentration of solutions (3).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawu(i) Suggest, giving a reason for each, two different safety precautions that should be taken when carrying out either of these preparations. (ii) Deduce the coefficients needed to balance the following equation for the reaction of silver with concentrated…
The sealed vessel was left for the reaction to proceed. Suggest two properties of the system, other than its colour, that could be measured to follow the progress of the reaction over time, and predict how each would change as the forward reaction proceeds.
A sample of 0.0120 mol of NO2 was placed in a sealed vessel of volume 1.00 dm3, which was kept at a constant temperature of 35 °C. (i) Suggest a simple way of keeping the vessel at a constant temperature in a school laboratory. (ii) The…
A sample of 0.0120 mol of NO2 was sealed in a vessel of volume 1.00 dm3 and kept at 10.0 °C until equilibrium was established. At equilibrium, the vessel contained 0.00860 mol of NO2 and 0.00170 mol of N2O4.…
The amount of NO2 prepared was checked by titration. The gas was first absorbed in water: 2 NO2(g) + H2O(l) → HNO3(aq) + HNO2(aq) The resulting solution was made up to 200.0 cm3 in a volumetric flask, and 20.0 cm3 portions…
Describe how a standard aqueous solution of potassium manganate(VII) can be prepared from the solid.
Describe the steps by which this standard solution is turned into a calibration curve for the colorimeter.
Explain how the calibration curve is then used to determine the concentration of KMnO4 in a reaction mixture of unknown concentration.
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