OCR B A-Level Chemistry Elements from the Sea Quiz

Anions go to the [blank_start]anode[blank_end].

Cations go to the [blank_start]cathode[blank_end].

Electolysis is the breaking down of a substance using [blank_start]electricity[blank_end].

This is an example of a half equation at the anode: 2Cl- (l)  Cl2 (aq) + 2e-

What is produced at the cathode if the element is more reactive than hydrogen

What is the most common oxidation state of oxygen?

The oxidation state of a monatomic ion is 0.

In a redox reaction

Reducing agents are oxidised and oxidising agents are reduced.

Volatility of halogens [blank_start]decreases[blank_end] down the group.

Halogens are more soluble in organic solvents than in water because

Chlorine is a [blank_start]yellow-green gas[blank_end] at RTP.

HF and HCl are not stable when heated.

An equilibrium constant that is less than 1 lies to the [blank_start]left[blank_end].

Increasing the pressure in an equilibrium reaction shifts the posisition of equilibrium to the side with [blank_start]fewer[blank_end] gas molecule to [blank_start]reduce[blank_end] the pressure.