What is produced at the cathode during the electrolysis of aqueous NaBr?

Question

1) What is produced at the cathode during the electrolysis of aqueous NaBr?
a) Na(s)
b) Br2(l)
c) H2(g)
d) O2(g)

2)What is produced at the anode during the electrolysis of aqueous NaBr?
a) Na(s)
b) Br2(l)
c) H2(g)
d) O2(g)

Answer 1

Cathode is the positive electrode, so negative charges will be attracted. Br- will drop off an electron and become Br, joining with another Br to produce Br2(l),

Anode is the negative electrode, so positive charges will be attracted. Na+ will be attracted to pick up an electron and become Na(s)

Answer 2

The previous answerer, science teacher, is half right. Bromine will indeed be produced at the anode. But he should know better than to say that solid sodium metal will be produced in water. The correct answer to 2) is of course H2(g). If ever solid sodium metal were to find itself in water for an instant, it would go kerflooey!

Answer 3

Bowl would be one hundred% secure to apply in case you wash it. you need to touch the aluminium in case you needed, that's merely been oxidised by potential of the oxygen formation and has 'rusted' ie. anodised. organic alumiunm oxidised in AIR - is going gray, in water it has a tendency to bypass slightly black and patchy (feasible chlorine an infection). If 'anodised' in an acid answer, many differeny colorings could be carried out...yet usually that's merely black. in case you go with to 'play' with low powered battery (9v / 12v - no longer a vehicle battery) powered electro-plating. Get some previous or broken GOLD or copper jewelery on one terminal (anode +) and yet another metallic - say metallic because of the fact the cathode (-) - supply it a pair of hours & you could gold or copper plate.....