Determine the solvent and solute in the following :

Question

a) carat 14 gold
b) gaseous drinking ( pepsi for ex.)

Answer 1

You generally assign the larger number to the solvent and the smaller number to the solute.
14k Au is 14/24 pure or about 58% Au. It is alloyed with Cu, Ag, or some other metal to make it harder. So I would call Au the solvent and Cu/Ag as the solute.

In a pepsi, the CO2 is the solute and rest of it is the solvent.

Answer 2

Copper is the solute and Gold is the solvent.

Carbon dioxide is the solute and flavoured (coloured) water (drinks) is the solvent.