Electrolysis

________: substance that conducts electricity when dissolved in water and is broken down by electrolysis.

________: Negatively charged ion that moves to anode.

________ and OH- ions are left in solution forming sodium hydroxide.

________: Positively charged ion that moves to cathode.

________: concentrated aqueous NaCl solution.

________ happens at the cathode.

During ________ (Al3+ + 3e- → Al) is produced at the carbon cathode and oxygen (2O2-- 4e- → O2) at the carbon anode.

Positively charged H+ and ________ are attracted to the negative electrode but only one will gain electrons.

If the ________ is above hydrogen in the reactivity series, then hydrogen will be produced and bubbling will be seen at the cathode.

________: The breakdown of an electrolyte (ionic compound, molten or aqueous solution) by passing an electric current.

Negatively charged ________- ions and non- metal ions are attracted to the positive electrode.

If a dilute ________ is being electrolysed, oxygen is formed.

________: Metal or graphite rods that aid the flow of electricity in and out of the electrolyte.

________ (other than hydrogen) are attracted to the positive electrode.

If no ________ are present, then OH- is discharged at the anode, gains electrons and forms oxygen gas.

The product formed depends on which ion loses electrons more readily, with the more ________ remaining in solution.

If the ________ is above hydrogen in reactivity series, then hydrogen will be produced and bubbling will be seen at the cathode.

The breakdown of an electrolyte (ionic compound, molten or aqueous solution) by passing an electric current

Metal or graphite rods that aid the flow of electricity in and out of the electrolyte

Positive electrode

Negative Electrode

Negatively charged ion that moves to anode

Positively charged ion that moves to cathode

substance that conducts electricity when dissolved in water and is broken down by electrolysis

The process of coating the surface of a metal (more reactive) with another metal (less reactive) using electrolysis

thin strip of pure metal

impure metal

Aqueous Salt Solution of metal

Impure copper as the anode and pure copper as the cathode; the aqueous copper (II) sulfate helps the copper ions move from the anode to the cathode

Cu2+ + 2e Cu (mass increases)

high m.p

this mixture has a lower m.p

concentrated aqueous NaCl solution

Na+, H+, Cl- and OH-

ions are left in solution forming sodium hydroxide