Reaction geochemistry describes the quantitative relationships among substances as they participate in chemical reaction. Composition geochemistry describes the relationships of mass among elements in compounds. Mole relationships in a chemical reaction can be determined by looking at the balanced reaction equation. My hypothesis is that if we correctly do the step by step procedures then we will demonstrate Geochemistry correctly. My expected results are a 1 to 1 mole ratio for Enhance ND Nasal and a 1 to 2 mole ratio for Angina and Nasal.
Procedure – Weigh a beaker and record its mass. Add approximately . 15 grams of sodium carbonate into the beaker and record the mass of the beaker and sodium carbonate. Add 40 ml of water into the beaker. Stir the beaker to combine the sodium carbonate and water. Add HCI from a beret while stirring until the mixture turns slightly green. Put the beaker on a hotplate until it starts boiling. Take the beaker off the hotplate and let the beaker cool. Once the beaker is cool add more HCI until the suture is yellow. Then put the mixture back on the hotplate.
Once the liquid has dissolved measure the remaining substance. Minus this amount from the initial weight of the empty beaker. We will do this once more for unknown substance #1 and twice for unknown substance #2. Wear safety goggles, gloves, and lab coat while participating in this lab to minimize any safety risks. Results: Though we were only able to obtain the final weight of unknown solid #2 trial #1 Nasal after evaporation the amount was . 12 grams. The final weight of Nasal or unknown #1 after evaporation was . 08 grams for trial 1 and . 05 grams for trial 2.
A trend noticed in this lab was that it took a higher volume of HCI to get to the yellow mixture for unknown substance #2 trial 1 and trial 2 compared to unknown substance #1 trial 1 and trial 2. There was also a negative trend for unknown substance #1 for the final weight of Nasal moving from . 08 grams in trial 1 to . 05 grams in trial 2. The percent yield for unknown substance #1 trial 1 was 53. 086% and for trial 2 was 33. 268%. Again, we were only able to obtain the final eight of unknown solid #2 trial #1 Nasal after evaporation the percent yield was 80%.
Discussion: The data is unreasonable, the reason being is that both unknown substances were below 100% percent yield making both of them Enhance. This shouldn’t happen in this lab, the reason being is that one of the unknowns should have over 100% yield and one should have under 100% yield. This would show which substance was Enhance (Under 100% yield) and which substance was Angina (Over 100% yield). The reason for this is that near the end of this lab we were gushing for time so this factor might have changed our results for the unknown substance #2.