Option # 1

Key Points

►Law of Conservation of Mass - Mater is neither created nor destroyed

during a chemical reaction.►Solubility –The max amount of a solute

that will dissolve in a solvent. ►Physical Property – describes physical

characteristics.►Chemical Property-describes some

type of change.

Part #1

►Obtain a 50 mL beaker and a 100 mL beaker.

►Place 5 grams of Na2SO4 in the 50mL beaker

►Place 20 mL of CaCl2 into the 100 mL beaker.

Part #1 Continued

►Once you have obtained the reactants, bring both beakers to the balance.

► Determine the mass of the liquids; you may put both beakers on the balance at the same time.

►Once the mass has been determined, mix the two beakers by pouring the Na2SO4 into the

CaCl2 small beaker into the larger beaker.

►Determine the mass a second time.

2nd half

►Same procedures but this time we will use Hydrochloric acid (HCl) and Sodium Bicarbonate (NaHCO3).

►Place 20 mL of HCl into the small beaker ►Place 50 mL of NaHCO3 into the large beaker. ►Again record the mass of the two liquids

before and after mixing.►Pour the HCl SLOWLY into the large

beaker in small portions.►Record the final mass of the beakers.

Part # 2

►Obtain four test tubes and a test tube rack and proceed to the front table.

►At the front bench; place a small piece of Zinc in two of the test tubes and place a equal amount of NaCl in the other two.

►Add a few mLs of water to one of the tubes containing the Zinc and one containing the NaCl.

►In the other two add a few mLs of HCl.

End of Part # 2

►By the end of this lab we observed a few examples of chemical properties.

►They are NaCl is soluble in water while Zinc is not, and Zinc reacts with HCl while NaCl does not.

Part # 3

►We are going to use physical properties to separate a mixture of salt and charcoal.

►Obtain 1 gram of the mixture and place it into a beaker also add 20 mL. of water.

► Carefully filter the mixture through filter.► Add second 20 mL portion of water to

your original beaker and repeat. ►How can the salt be removed?