Question

Consider four different samples: aqueous LiF, molten LiF, aqueous AgF, and molten AgF. Current run through each sample produces one of the following products at the cathode: solid lithium, solid silver, or hydrogen gas. Match each sample to its cathodic product. Drag the appropriate items to their respective bins.

Answer 1

Molten LiF forms solid lithium

Aqueous AgF forms solid silver

Aqueous LiF forms hydrogen gas.

Step-by-step explanation:

Aqueous solution of
`LiF` has water molecule, there will be competing will be two competing cations for reduction, while
`Li^(+)(aq)` and
`H^(+)(aq)`.However the reduction potential of
`H^(+)(aq)` is more than that of the
`Li^(+)(aq)` . Hence,
`H^(+)(aq)` reduced to hydrogen gas.

Molten
`LiF` has only solid form of
`LiF` and
`Li^(+)(aq)` reduced to form
`Li` solid.

An aqueous form of
`AgF` contains water molecules.there will be competing will be two competing cations for reduction, while
`Ag^(3+)(aq)` and
`H^(+)(aq)`.However the reduction potential of
`Ag^(3+)(aq)` is more than that of the
`H^(+)(aq)` . Hence,
`Ag^(3+)(aq)` reduced to solid silver.

Therefore, Molten LiF forms solid lithium

Aqueous AgF forms solid silver

Aqueous LiF forms hydrogen gas.