You are worried that a solid substance has dissolved in a beaker of water in a lab. What would be a way to separate the substance from the water?
Use a magnet to draw out the solid substance from the water.
Pass the solution through a filter to let the dissolved substance separate.
Boil the water away, leaving the substance behind in the beaker.
Pour the liquid along a rough surface that would catch the solid particles but not the water.
i need help plzz
Sure! I can help you figure out the best way to separate the solid substance from the water. Let's evaluate the options you provided:
1. Use a magnet to draw out the solid substance from the water: If the solid substance is magnetic, using a magnet could be a viable option. However, if the substance is not magnetic, this method would not work.
2. Pass the solution through a filter to let the dissolved substance separate: This method is called filtration and is commonly used to separate solids from liquids. It works by passing the solution through a filter, which allows the liquid (water) to pass through while trapping the solid substance.
3. Boil the water away, leaving the substance behind in the beaker: This method is called evaporation. By heating the solution, the water will evaporate, leaving behind the solid substance in the beaker. However, keep in mind that this method may not be suitable for all substances, as some may be affected by heat.
4. Pour the liquid along a rough surface that would catch the solid particles but not the water: This method is known as decantation. By pouring the liquid along a rough surface, the solid particles can be trapped while the water continues to flow. However, this method may not be as efficient as filtration.
Considering all the options, the best choice for separating the solid substance from the water would likely be option 2: Pass the solution through a filter to let the dissolved substance separate. Filtration is a commonly used technique in the laboratory setting and is effective in separating solids from liquids.