1. Dissolving: Sodium chloride is soluble in water, while sulfur sand is not. Add water to the mixture and stir. The salt will dissolve, leaving the sand behind.
2. Filtration: Use a filter paper (like a coffee filter) to separate the undissolved sand from the salt solution. The sand will be trapped on the filter, and the salt solution will pass through.
3. Evaporation: You can then evaporate the water from the salt solution to recover the solid sodium chloride. This can be done by heating the solution gently.
Let's break down why this works:
* Solubility: Different substances have different solubilities. This means they dissolve in different amounts in a given solvent (like water). Sodium chloride is highly soluble in water, while sulfur sand is practically insoluble.
* Filtration: Filtration separates substances based on particle size. The filter paper traps the larger sand particles, allowing the smaller dissolved salt ions to pass through.
* Evaporation: Evaporation removes the solvent (water) from the solution, leaving behind the dissolved substance (sodium chloride).
This process is a simple and effective way to separate a mixture of sulfur sand and sodium chloride.
