Pre-Lab-Sand/Salt Mixture-Physical Science

What are the procedures you will be using to separate the sand and salt? Pick all that apply

• Evaporation (crystallization)

• Dissolving

• Magnetism

• Filtering

You have to measure the mass of the original sand/salt mixture before adding the water. 

• False.  You get the mass after adding the water to the sand/salt mixture.

• True.

What do you cover the evaporating dish with while the solution is being heated over the bunsen burner?

• the wire gauze

• a watch glass

• your partner's face

• a beaker

To calculate the mass of the salt in the evaporating dish, you...

• subtract.  The mass of the evaporating dish and salt - the mass of the empty evaporating dish.

• This is a trick question.  We do not have to calculate the mass of the salt.

• divide.  The mass of the salt  the mass of the sand/salt mixture

• subtract.  The mass of the  empty evaporating dish  - the mass of the evaporating dish and salt.

How do you calculate the percent of salt in the original sample?

• subtract.  Mass of evaporating dish and salt - mass of empty evaporating dish.

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