Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
Dodaj cały arkusz do zestawu(i) Determine the limiting reactant when 2.00 g of this powder reacts. (ii) Determine the volume, in dm3, of carbon dioxide released in the reaction in (i) at SATP. Use sections 1, 2 and 4 of the data booklet. (iii) A student collects 0.190…
The structure of a tartaric acid molecule is shown. (i) State how many hydrogen atoms in a tartaric acid molecule are acidic. (ii) Deduce the structural formula of the conjugate base of tartaric acid. (iii) Predict, giving a reason, whether tartaric acid is a…
A solution has a hydrogen ion concentration [H+] = 0.0063 mol dm−3. Calculate its pH.
(i) Calculate, in J, the thermal energy gained by the water. Use sections 1 and 2 of the data booklet. (ii) Determine the percentage uncertainty of the energy value from (i). (iii) Suggest one way to reduce the effect of random uncertainty on the final result.
(i) Determine the molar enthalpy of combustion of butan-1-ol, in kJ mol−1, and state one assumption you made. If you did not obtain an answer to 2a(i), use 20 000 J, but this is not the correct value. (ii) Calculate the percentage error of your…
Methanol and butan-1-ol are members of the same homologous series. (i) Name the class of compound and the functional group that characterize this series. (ii) State the strongest intermolecular force between molecules of either alcohol. (iii) Predict one type…
Deduce the expression for Kc of this reaction.
Predict, with a reason, the effect of increasing the total pressure, at constant temperature, on the position of equilibrium.
Explain why a higher temperature speeds up this reaction, with the help of annotations that you add to the Maxwell-Boltzmann distribution below, which is drawn for a temperature T1.
The Maxwell-Boltzmann distribution for the uncatalysed reaction at temperature T1 is shown below. Add annotations to show how a catalyst changes the situation.
(i) State the oxidation states of carbon in carbon monoxide and in carbonyl chloride. (ii) For each of CO and Cl2 in the forward reaction, state whether it acts as an oxidizing agent or a reducing agent, and whether it is oxidized or reduced.
(i) Draw the Lewis (electron dot) structure of carbonyl chloride. (ii) Mark the bond polarities on your Lewis structure using the symbols δ+ and δ−. (iii) Explain the shape of the carbonyl chloride molecule and whether it is polar. (iv) Outline…
State the electron configuration of a phosphorus atom, P.
State one physical property of phosphorus that supports its classification as a non-metal.
Suggest a balanced equation for the reaction of carbon dioxide with water that contributes to ocean acidification.
Chromium is a first-row transition element. (i) Deduce the nuclear symbol, ZAX, of the chromium-52 ion that contains 21 electrons. (ii) Chromium(II) chloride, CrCl2, melts at 824 °C. Explain how the ions are held together in solid…