Flame Test Lab Report

The results from most of the experiment best fit with Potassium chloride, although not all the test fit with potassium chloride. For example, in “Part A” When the salt was put in the flame it made the flame turn violet. This supports the conclusion that the salt is potassium chloride because potassium chloride also makes a violet flame when burned. The flame test was the most conclusive test because all 8 of the possible salts that were given have very significant flame color. None of the other salts have a violet color flame when burned which goes to prove that the salt is potassium chloride. Another example is when the salts water attraction from there air was tested. When the salt was set out for 20 minutes the mass of the salt changed

Which is the same as potassium chloride as potassium chlorides melting point is 770 degrees Celsius. “Part B” experiment was to figure out the water percentage of the unknown salt “579” and the results of this test after some calculations was that there was 0.024% of H2O inside of salt “579”. This percentage is very low and out of the 8 salts its closes to zero percent water. Potassium chlorides water percentage is zero which only helps prove the point that the salt “579” is potassium chloride. In “Part C” the density of the salt was calculated, and it turned out to be 1.73 g/mL and compared to the 8 known salts it could be potassium chloride which is 1.98 g/mL or calcium chloride dehydrate 1.85 g/mL. Considering the other 6 characteristics of calcium chloride dehydrate there is no way this is possible because its water percentage is 24.5% and salt “579” water percentage is 0.024%. The least reliable test result was “Part D” the heat of solution of salt “579” which was significantly different from potassium chlorides heat of solution. The heat solution of salt “579” was -2.44 kcal/mol and the heat solution of potassium chloride is 4.404