Question

question 4. a student prepared two mixtures, each in a labeled beaker. enough water at 20°c was used to make 100 milliliters of each
information about two mixtures at 20.°c

	mixture 1	mixture 2

|student observations|• colorless liquid

• no visible solid on bottom of beaker|• colorless liquid
• black solid on bottom of beaker|

other data

• mass of nacl(s) dissolved = 2.9 g

• mass of fe(s) = 15.9 g

• density of fe(s) = 7.87 g/cm³|

describe a procedure to physically remove the water from mixture 1.

Explanation:

Evaporation can be used to separate a soluble solid - liquid mixture. Heat the mixture to make water evaporate, leaving the salt behind.

Answer:

Heat the mixture 1 in a beaker over a Bunsen burner or hot plate. As the water is heated, it will evaporate, leaving the dissolved table - salt (NaCl) behind in the beaker. Use a gentle heat source and stir occasionally to ensure even heating and prevent splashing. Once all the water has evaporated, turn off the heat source and allow the beaker to cool before handling.