QUESTION ONE (a) What are concentration cells? Describe and discuss an electrolyte
concentration cell without transference
1101
(b) Calculate the EMF of the electrode concentration cell
121
PL Halpu). HCI. Hapa): Pt at 25°C if p = 600 torr and p2 = 400 torr
(c) Predict whether the following reaction would proceed spontaneously as
written at 298 K
Cd(s)
Fe (aq)
Cd2(aq)
Fe(s)
Given that [Cd?'y = 0.15M and [Fe2+] = 0.68M
The standard reduction potentials of cadmium and iron are -0.403 and -0.447
volts respectively
[3]
(d) Explain reversible cell? Name the different types of reversible cell (5)

Idon’t understand this page, can someone ?

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

Which property of water causes water drops to bead on a freshly waxed car?