Separating+sand+and+salt

=Separating sand and salt= This experiment will be used to practice how to write a scientific report of your work.

You will be given a mixture of sand and salt. Your job is to separate the sand from the salt.

You will be graded on how well you write the report.

It is important that you list all the equipment that you will use in your experiment.

=Aim= To understand that some materials can be separated by dissolving in water and filtering the waste material. The material which dissolves can be recovered by evaporation.

=Method=
 * 1) Pour the sand-salt mixture into the beaker so that it just covers the base.
 * 2) Add about 50 cm3 of water, or add water until the beaker is about one-fifth full.
 * 3) Stir the mixture gently for a few minutes.
 * 4) Filter the mixture into a conical flask.
 * 5) Pour the filtrate into an evaporating basin.
 * 6) Heat the salt solution gently until it starts to decrepitate (“spit”). CARE: Keep eye protection on and do not get too close.
 * 7) Turn off the Bunsen burner and let the damp salt dry in the dish.



=Results=

What results will you take? Can you calculate the amount of salt in your original mixture as a percentage by weight?

=Evaluation=

What would you improve if you did this experiment again?