2nd Lap Report

Lab Report

Berkley, Kelly, Noah

June 17, 2014

5E Procedure: First, we predicted that dropping vinegar into baking soda would cause bubbling and carbonation. Then, after placing the vinegar into the well slot filled with a small amount of vinegar, we watched it bubble, and then harden.

Data Table:

5E       

	Predictions	Observations	Results
Well-Plate 1	We predict that dropping vinegar in baking soda will cause carbonation/bubbles	It bubbles	It then hardens and gives off an unpleasant odor

6F Procedure: First, we counted 10 post 1982 pennies, and found their mass on the scale. Then we did the same thing for 10 nails. Afterwards, we filled a clean test tube with blue dye, and dropped a nail into it. About 7 minutes later, we found that the portion of the nail that was in the dye had turned white. From the result, we can assume that the nail is chemically reactive to this blue dye. 

6F

Object	Mass	Volume	In blue test tubes
Pennies	25.08 g
Nails	20.36 g		Nail turns white in blue dye after about 7 minutes
Cylinder		50 mL (pennies) 50 mL (nails)
Cylinder with pennies		53 mL
Cylinder with nails		54 mL

1A Procedure: For this procedure we started with taking a piece paper and tearing into tiny little pieces. We put the tiny pieces of paper on a watch glass afterwards and recorded our observations (nothing happened). We put the watch glass over a heat resistance pad and attempted to light the pieces of paper on the watch glass. We then recorded our observations, which were that the tiny pieces of paper could not catch on fire. We can infer from this that paper in tiny pieces cannot catch fire.

	Predictions	Observations	Results
Investigation 1	None	Ripping	Nothing
Investigation 2	Paper will burn	Papers do not catch on fire. It is burning but it does not catch fire	Papers are burnt and it gives off a campfire aroma

2B Procedure: First, we placed two tubes on a test tube rack. Then we dropped one drop of Universal Indicator into the test tube. Then we dropped 10 drops of ammonia solution into that test tube, which turned red. Afterwards, we again placed a single drop of Universal Indicator into the second test tube. We then place 10 drops of vinegar into the test tube, which turns blue. We mix both together, making it turn purple.

	Prediction	Observation	Results
Test tube 1	Color will change	Universal Indicator + Ammonia creates purple	Color is purple
Test Tube 2	Color will change	Universal Indicator + vinegar creates red	Color is red
Test Tubes combined	Colors will mix together and change		Mixed together, they create green

3C Procedure: For this procedure we started off with a spatula and used it to place blue crystal into a mortar. We then used a pestle to grind up the blue crystals into a light blue powder like material. Afterwards we put the powder into a crucible. We turned on the hot plate to a setting of “high” and measured and recorded the crucible with the blue powder in it. Afterwards, we let the crucible sit on hot plate for a good 3 minutes and afterwards the blue powder had melted a bit. We measured and recorded the mass again afterwards. After we disposed of the blue powder and cleaned up.

3C

	Observations	Mass
Crystals	Crystals grind into white sand-like grains
Crystals in crucible on hotplate	It bubbles while on the hot plate	28.10g
Crystals in crucible

4D Procedure: First, we turned on the hot plate, and then took out the wick from the candle. After, we placed the candle inside of a beaker and placed that on the hot plate. While observing that and writing down what we saw, we then took then placed a regular candle on fire and observed that as well.

4D

	Observations	Results
Candle on hot plate with ought wick	The wax melted, and the candle was steaming inside the beaker	Melted, watery wax spills over the metal holder and into the beaker and it lets off a lot of smoke
Candle with wick	Just burns	Not a lot of melted wax

Here are some photos from our lab!