Option # 1. Key Points ► Law of Conservation of Mass -  Mater is neither created nor destroyed during a chemical reaction. ► Solubility –The max amount.

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Presentation transcript:

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 Na 2 SO 4 in the 50mL beaker ► Place 20 mL of CaCl 2 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 Na 2 SO 4 into the CaCl 2 small beaker into the larger beaker. ► Determine the mass a second time.

2 nd half ► Same procedures but this time we will use Hydrochloric acid (HCl) and Sodium Bicarbonate (NaHCO 3 ). ► Place 20 mL of HCl into the small beaker ► Place 50 mL of NaHCO 3 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?