A mixture of sand and salt can be separated by ?

To separate a mixture of sand and salt, you can use a simple process involving water and filtration. Start by adding water to the mixture, which will dissolve the salt but leave the sand behind. Stir the mixture well to ensure that the salt fully dissolves. Next, pour the mixture through a filter paper placed in a funnel; the sand will be caught in the filter paper while the salty water passes through. Finally, to get back the salt, you can heat the salty water until all the water evaporates, leaving behind the salt crystals. This method effectively separates the sand from the salt, utilizing their different solubilities.