Physical Chemistry & Transition Elements Random Retrieval

For this question, look at the resource, ‘A Selection of Standard Electrode Potentials’ (‘A Selection of Standard Electrode Potentials’can be found in TOOLS>Data Sheets)

Is Cu²⁺_(aq) capable of oxidising Ag_(s)?

Which first-row d-block metal forms aqueous ions in the +6 state which are orange in acid solution but yellow in alkaline solution?

Calculate the value of the enthalpy change associated with the following equation?

3Rb_(g)=> 3Rb_(s)

For which of these compounds would expect the best agreement between the values of the lattice energy derived from experimental data (with the help of the Born-Haber cycle) and the values calculated from theory on the assumption that the bonding in the crystals is purely ionic?

Consider the following equilibrium:

3Fe_(s) + 4H₂O_(g) Fe₃O_4(s)+ 4H_2(g)

40.0 g of iron wool was placed in a vessel of volume 2.00 dm³. The iron was exposed to 20.0 mol of high pressure steam and the system allowed to settle to equilibrium. At equilibrium, 0.250 mol of hydrogen was found in the vessel. The gauge on the pressure vessel read 1 000 kPa. The volume of iron wool was insignificant.

Calculate the value of K_p (no units) under these conditions.

For the following equilibrium K_c = 25.0 mol^-2 dm⁶ at a particular temperature.

CO_(g) + 2H_2(g) <=> CH₃OH_(g)

Which of these changes of conditions alter the value of K_c?

(i)Raising the concentration of hydrogen

(ii)Adding a catalyst

(iii)Raising the pressure

(iv)Lowering the temperature

Consider the following reaction:

2H₂O_2(g) => 2H₂O_(g)+ O_2(g)

The rate equation was found, by experiment:

rate = k [H₂O₂]

Which of the following statements is/are true?

(i) The mechanism must be multi step

(ii) Doubling [H₂O_{] quadruples the rate of the reaction}

(iii) [H₂O] must be consumed in more than one step

(iv) The mechanism probably has only one step

Consider the following reaction:

2NO_(g) + O_2(g) => 2NO_2(g)

The rate equation was found, by experiment:

rate = k [NO_(g)]² [O_2(g)]

Which of the following statements is/are true?

(i) Doubling [O₂] has no effect on the rate of the reaction

(ii) Doubling both [NO] and [O₂] quadruples the rate of the reaction

(iii) Tripling [NO] triple the rate of the reaction

(iv) The mechanism may have only one step

What are the units of k for this reaction?

By inspection of this experimental data, what is the rate equation for this reaction?