6.1-6.4: Electrolysis

Negative bromide ions

Negative bromide ions

________ move to the positive electrode (anode) and each loses one electron to form bromine molecules.

Electrode

________ is a rod of metal or graphite through which an electric current flows into or out of an electrolyte.

Anion

________ is a negatively charged ion which is attracted to the anode.

Molecular substances

________ are non conductors because they contain no free electrons or charger particles that can flow through them.

Electrolyte

________ is the ionic compound in molten or dissolved solution that conducts the electricity ⚡️.

cathodeExample of lead

If the metal is above hydrogen in reactivity series, then hydrogen will be produced and bubbling will be seen at the ________ (II) bromide.

Cathode

________ is the negative electrode of an electrolysis cell.

Anode

________ is the positive electrode of an electrolysis cell.

Cation

________ is a positively charged ion which is attracted to the cathode.

metal

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

Electrolysis

________ is the break down of an ionic compound when in molten or in aqueous form by the passage of electricity.

Positive electrode

The halogen gases all produce their own colours (bromine is red- brown, chlorine is yellow- green and fluorine is paleyellow) ________.

Ionic substances

________ dont conduct when solid but do conduct when melted or dissolved.

Positive lead ions

________ move to the negative electrode (cathode) and gain electrons to form a grey lead metal which deposits on the surface of the electrode.

metal ions

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

halide solution

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

Anode Negative

Positive is ________ is Cathode.

halide ions

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

Non metal ions

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

Ionic compounds

________ in the solid state can not conduct electricity either since they have no free ions or electrons that can move and carry charge.

Covalent compounds

________ can not conduct electricity hence they do not undergo electrolysis.