Chemical Reaction Lab Report

Decent Essays
In this lab there was 2 objectives which where to recognize when a chemical reaction has occurred and practice collecting detailed observations in the laboratory using proper scientific terms.
Reaction set #1
(1a) place approximately 1 ml of 0.1 M Pb (No3)2 solution into a test tube. Then sequentially add drops of 0.25M k2CRO4 solution until you see evidence of a chemical reaction. The products of this reaction are aqueous KNO3 and solid PbCrO4.
(1b) place approximately I ml of .1M Pb (NO3)2 solution in a test tube. Then sequentially add drops of .25 M NaSo4 solution until you see evidence of a chemical reaction. The products of this reaction are aqueous NaNo3 and solid PBSO4.
Reaction set#2
(2a) place 1 ml of dilute HCl into a test tube, and
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Using your tongs, hold a small piece of magnesium in the flame. Do not look directly into the flame during this reaction.
(1a) Pb (NO3)2 is a colorless solution. K2CrO4 is a yellow colored solution. Both solutions seemed to be odorless. When the K2CrO4 was added to the test tube that had the Pb (NO3)2 solution in it there was yellow color particles/ precipitation started to form in the test tube. The test tube seemed to have cooled down. (Lead 2 cromate)
(1b) both the Pb (NO3)2 solution and the Na2SO4 solution are colorless. When Na2SO4 added to the test tube that already had Pb (NO3)2 in it there was a chemical reaction. There were bubbles (which is sometimes a sign of a reaction), white perception. The test tube got colder. The solution becomes a milky white color. (particilits (most likely PbSO4).
(2a) the solution dilute HCl was colorless while the magnesium was silver colored. There were bulbes, due to the lit wooden split making a pop sound when it was put into the test tube the gas created was Hydrogen.
(2b) the gas in this reaction was oxygen as the glowing splint placed in the test tube was relit. The solution was orange/gold brown
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The NaOH is a colorless solution. HCl is also a colorless solution. The test tube heated up immediately after adding in the (HCl).
(3b) distilled water is a colorless liquid. While NH4Cl (Nh4 is known ammonium) is a white powder that looked like salt and also looked glittery. The test tube was cooled down.
(4a) CuSO4 is an acura blur color solution that seemed to have stuff at the bottom of the bottle that it was in. the zinc granules have a silver color to them. At first there it was little to no changes. But after a while the solution color had changed color and zinc granules had turn to copper. The copper was a dark brownish red color. (The solution became zinc sulfate) it looked like the zinc graduals had leached the copper out of the solution and turn them to a solid.
(4b) the magnesium before it was put into the flame was silver in color, was brittle, shiny, and reflected light. It took 45 seconds to a minute before there was a reaction once the piece of magnesium was put into the flame. First it was an edge the lit up then the entire piece of magnesium lit up and looking at it could be described as it like looking directly at the sun. Once it was place onto the table top it seem to of saterd on contact. The magnesium was wrightest/gray in

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