Separating Rock Salt

Separating Rock Salt

Grinding

Dissolving

Filtering

Evaporation

Grind the mixture to make sure the salt crystals are small, so will dissolve easily

Put the mixture in water and stir. The salt will dissolve, but the sand won't

Filter the mixture. The grains of sand won't fit through the tiny holes in the filter paper, so they collect on the paper instead. The salt passes through the filter paper as it's part of the solution

Evaporate the water from the salt so that it forms dry crystals. (You could also use crystallisation here if you wanted to make nice, big crystals)