How do you separate a mixture of iron pellets, KBr, and sand?
Not sure about the KBr and the sand but iron is magnetic so that can be removed with a magnet. Sorry I cannot answer fully.
To separate a mixture of iron pellets, KBr (potassium bromide), and sand, you can follow a process called selective solubility and filtration. Here's how you can do it step-by-step:
1. First, use a magnet to separate the iron pellets from the mixture. Since iron is a ferromagnetic material, it will be attracted to the magnet, allowing you to easily remove it from the mixture.
2. After removing the iron pellets, you will be left with a combination of KBr and sand. Next, add water to the mixture and stir well. This will dissolve the potassium bromide (KBr) in the water.
3. Once the KBr is dissolved, you can use a filtration setup to separate it from the sand. Set up a filter paper or a funnel with filter paper on top of a receiving flask or beaker. Pour the mixture into the funnel, allowing the liquid (containing dissolved KBr) to pass through while retaining the sand on the filter paper.
4. After filtration, you will have a solution containing the dissolved KBr and a residue of sand on the filter paper. To separate the KBr from the water, you can use the process of evaporation. Pour the solution into an evaporating dish and gently heat it. As the water evaporates, the KBr will be left behind as solid crystals.
5. Once the water has completely evaporated, you will be left with dry potassium bromide (KBr) crystals in the evaporating dish and the sand on the filter paper. The sand can be collected and kept separately.
By following these steps, you will have successfully separated the mixture of iron pellets, KBr, and sand.