Chemistry PODs 46-50

POD # 46 10/19/2015 Write your first and last name and today’s date in the upper right hand corner of your paper. Fold your paper into fourths. Be sure to number and date each POD. Determine whether the examples given are matter or non-mater. fire b. bacteria c. oxygen d. light Determine whether each is a pure substance or a mixture. a. coffee b. sodium bicarbonate (NaHCO3) c. air

POD # 47 10/20/2015 Make sure that each POD is numbered and dated. Determine whether each is a physical or chemical property. Melts at 50 degrees b. rusts when exposed to oxygen Determine whether each is a physical or chemical change. Mixing a yellow substance with a blue substance produces a green substance. Mixing a solution with baking soda and a solution with calcium chloride produces a white solid.

POD # 48 10/21/2015 Make sure that each POD is numbered and dated. A solution is a solid dissolved in a liquid. Kool-Aid is an example of a solution. Are solutions homogeneous or heterogeneous mixtures? An alloy is a metal made by combining two or more metals. Bronze is made by mixing copper and tin. Are alloys homogeneous or heterogeneous mixtures? bronze

POD # 49 10/22/2015 What was the hardest topic from unit 2? What was the easiest topic from Unit 2? What did you do to prepare for the Unit 2 test? Do you feel that your method of studying has been successful? If not, what can you do differently?

POD # 50 10/23/2015 How were elements first arranged in the periodic table? Why was there a problem with this arrangement? How are elements arranged in the current periodic table? Who came up with this arrangement?