4. a. A sample of a CaCl2 2H,O/K,CO+H,O solid salt mixture is dissolved in -150

Question

4. a. A sample of a CaCl2 2H,O/K,CO+H,O solid salt mixture is dissolved in -150 mL of deionized water previously adjusted to a pH that is basic. The precipitate, after having been filtered, was air-dried and weighed. Data for Trial 1 were obtained as shown. Complete the following table. (See Report Sheet.) Record calculated values with the cor- rect number of significant figures. A. Precipitation of CaC20 H2O from the Calculation Zone Salt Mixture 3. Mass of salt mixture (g) 4. Mass of filter paper (g) 5. Mass of filter paper and CaC,O, H,0 (8) 6. Mass of air-dried CaC2O, H,O() 0.879 L896 Data Analysis, 1 2.180

Explanation / Answer

6)Mass of air dried CaC2O4 H2O

= (mass of filter paper and CaC2O4 H2O) - ( mass of filter paper )

= 2.180 g -1.896 g

= 0.284 g

Mass of air- dried CaC2O4 H2O is 0.284 g.

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