The metals Mg and Al, like most metals in groups 1A, 2A, and 3A of the periodic table, cannot be obtained by chemical reduction with carbori at reasonable temperatures. What process I5 used to obtain these metals from their ores? positive

Which substance in this spontaneous reaction is considered the strongest oxidizing agent? 2Al(s) + 3Cu?trag) – 2A13* (ag) + 3Cu(s)

A student wanted to measure the concentration of cobalt(II) ion in an aqueous solution. For the cathode half-reaction, she used a silver electrode with a 0.51 M solution of AgNO3. For the anode half-reaction, she used a cobalt electrode dipped into the aqueous solution. If the cell gave a potential of 1.043 V at 25 °C, what was the concentration of Co2+ in the solution? Half-reaction E° (V) Ag*(aq) + e- Ag(s) +0.7996 Co2+(aq) + 2 e- -0.28 Co(s) Your Answer: Answer units

Calculate the time needed to produce 2.8 g of Sodium metal at the cathode when a 15 amp current is passed through molten Sodium chloride.

Predict the products that would be formed at the anode and the cathode during the electrolysis of aqueous Cu(NO3)2(aq). Assume that Pd electrodes are used. Write the cell reaction and calculate the minimum voltage that must be used for this cell to operate.

In the Hall - Heroult process, aluminum is produced by the electrolysis of molten Al₂O3(0). The half reactions are C(s) +20²- (aq) → CO₂(g) + 4e¯ Al³+ +3e → Al(s) (aq) The mass of Al(s) produced for 2.00 kg of C(s) consumed is (round to the nearest kg) 6.00 kg 1.69 kg 2.45 kg 3.00 kg

As2O3(s) + NO3- (aq) → H3AsO4(aq) + N2O3(aq) Identify the oxidizing agent. Identify the reducing agent. Balance the overall reaction in acidic media.

What quantity of energy, ΔH, can be obtained from roasting of 35g of zinc sulfide ore?ZnS(s) + O2(g) → ZnO(s) + SO2(g)

Based on the cell diagram, Au( s) | Au 2+( aq) || O 2( g) | H +( aq) | H 2O( l ) | Pt( s), which statement below is FALSE? a.The reaction occurs under acidic conditions. b.Au is oxidized at the anode. c.H+ is oxidized at the anode. d.O2 is reduced at the cathode. e.Four moles of electrons are transferred in the balanced redox reaction.

In the Hall-Heroult process, a large electric current is passed through a solution of aluminum oxide (Al,0,) dissolved in molten cryolite (Naz AIF, resulting in the reduction of the Al,0, to pure aluminum. Suppose a current of 8300. A is passed through a Hall-Heroult cell for 29.0 seconds. Calculate the mass of pure aluminum produced. Be sure your answer has a unit symbol and the correct number of significant digits. ロロ の