chemistry electrolysis

electrolytes have to be…

• able to conduct

• dissolved

• molten

• solid

anode is

• positive

• negative

cathode is

• positive

• negative

what happens at the anode

• reduction

• oxidation

what happens at the cathode

• oxidation

• reduction

what will migrate to cathode in NaCl solution

• Na+

• H+

• OH-

• Cl-

in NaCl solution what will be reduced at cathode (least reactive)

• H+

• Na+

in NaCl solution what will migrate to anode

• Na+

• H+

• Cl-

• OH-

in NaCl solution what will be oxidised at anode (halide)

• OH-

• Cl-

oxidation half equation…

• electrons after arrow

• electrons before arrow