To determine the percent composition of a sand and salt mixture.

EQUIPMENT

‡ 250 ml beaker (an extra beaker to put under the funnel to collect the salty water)

‡ sand and salt mixture of secret proportion/ratio

‡ retort stand

‡ filtering funnel

‡ filtering paper

‡ boss head

‡ ring clamp

‡ stirring rod

METHOD

‡ Weigh a 250 ml beaker on a electric scale

‡ Add sand of 100 ml volume and note down the weight of the sand only - (you can determine the weight of the sand by taking away the weight of the beaker from the weight of the beaker with sand in it)

‡ Add water, stir and decant three times until the water is no longer salty (a taste test maybe")

‡ Filter the sand and water using a funnel and filter paper - (evaporation is another method also)

‡ Dry the sand and filter paper overnight or place in an incubator

‡ Weigh it and...