Question

sequence the steps (1 - 4) of separating a mixture of sand, salt, and iron filings. identify which physical property you were using in each step. mix the sand and salt mixture with water. physical property used: boil the salt and water mixture, leaving the salt behind. physical property used: separate the iron filings from the sand and salt by using a magnet. use filtration to separate the sand from the salt and water. physical property used: science notebook - matter - properties and changes 39

Explanation:

Step1: First separate iron filings

Iron is magnetic. Use a magnet to separate the iron filings from the sand - salt mixture first. This uses the magnetic property of iron.

Step2: Mix sand - salt with water

Salt is soluble in water while sand is not. Mix the sand - salt mixture with water. The physical property used is the solubility of salt in water.

Step3: Filter to separate sand

Use filtration to separate the insoluble sand from the salt - water solution. The physical property used is the difference in particle size (sand particles are too large to pass through the filter paper while the salt - water solution can).

Step4: Boil to get salt

Boil the salt - water mixture. Water has a lower boiling point than salt. Evaporating the water leaves the salt behind. The physical property used is the difference in boiling points.

Answer:

1. Separate the iron filings from the sand and salt by using a magnet. Physical property used: Magnetism of iron.
2. Mix the sand and salt mixture with water. Physical property used: Solubility of salt in water.
3. Use filtration to separate the sand from the salt and water. Physical property used: Difference in particle size.
4. Boil the salt and water mixture, leaving the salt behind. Physical property used: Difference in boiling points.