(c) A simple set-up was used to compare the conductivity of water samples obtained from the Salton Sea at different depths. The following data were obtained: Depth water sample was obtained from / m () Electric current recorded by the…
(a) Outline two features of this experiment that ensure that the propanal intermediate is not a major product.
Which combination of substances is correctly used for electroplating an iron object with tin using an electrolytic cell? A. X: tin, Y: iron, Z: tin(II) sulfate solution B. X: iron, Y: tin, Z: tin(II) sulfate solution C. X: tin, Y: iron, Z: iron(II) sulfate…
Which statement about this reaction is correct? A. Chlorine is the reducing agent. B. Oxygen is the reducing agent. C. Chlorine is reduced. D. Oxygen is oxidized.
Which of these reactions will occur spontaneously? I. II. III. A. I and II only B. I and III only C. II and III only D. I, II and III
Which combination is correct for this cell, when nickel is more reactive than silver? A. Cathode: silver; anode: nickel; sign on cathode: -; sign on anode: + B. Cathode: nickel; anode: silver; sign on cathode: -; sign on anode: + C. Cathode: nickel; anode:…
Which products are produced at the electrodes by the electrolysis of aqueous sodium iodide? A. Product at cathode: sodium; product at anode: iodine B. Product at cathode: hydrogen; product at anode: iodine C. Product at cathode: iodine; product at anode:…
The cyanide ion acts as a ligand in many complex ions, for example hexacyanoferrate(III), . (i) State the type of bond, as precisely as possible, that joins each cyanide ion to the iron ion. (ii) Deduce the oxidation state of iron in…
(i) State the independent variable and the dependent variable of the investigation. (ii) Apart from the mass of leaves and the volume of water, suggest two other conditions that should be kept constant for the comparison between boiling times to be valid.…
Gallium forms a sulfate of formula . (i) Both ionic and covalent bonding are present in this compound. State which particles are held together by each type of bond. (ii) Contrast covalent and ionic bonds in terms of what happens to the valence…