Calculator Allowed: Yes



Transcription of this question: 5.Copper forms two chlorides, copper(l) chloride and copper(ll) chloride.(ii)(iii)State the electron configuration of the ion.Copper(ll) chloride is used as a catalyst in the production of chlorine fromhydrogen chloride.4HCl (g) + 02 (g) 2C12(g) + 21420 (g)Calculate the standard enthalpy change, AHe, in kJ, for this reaction, usingsection 12 of the data booklet.The diagram shows the Maxwell—Boltzmann distribution and potential energyprofile for the reaction without a catalyst.Annotate both charts to show the activation energy for the catalysed reaction,using the label Ea[2][2]Kinetic energy4HCl (g) + 02(g)2C12 (g) + 2H20 (g)Progress of reaction(iv)Explain how the catalyst increases the rate of the reaction.[2](b)Solid copper(ll) chloride absorbs moisture from the atmosphere to form a hydrate offormula CuC12•xH20.A student heated a sample of hydrated copper(ll) chloride, in order to determine thevalue of x. The following results were obtained:Mass of crucible = 16.221 gInitial mass of crucible and hydrated copper(ll) chloride = 18.360gFinal mass of crucible and anhydrous copper(ll) chloride = 17.917 gDetermine the value of x.(c)An electrolysis cell was assembled using graphite electrodes and connected as shown.0)Molten copper(l) chlorideState how current is conducted through the wires and through the electrolyte.[2]Wires:Electrolyte:(ii)Write the half-equation for the formation of gas bubbles at electrode 1.

Leave a Reply