Honors Chem Labs

I. Introduction:  The purpose of the lab was to identify an unknown solid using the experimental data and known solubility data. What we did to achieve the identity of the solid was create a procedure.  In this lab, we used the graph of the solubility curves of three known solids (NaCl, NaNO3, and KNO3) in order to identify an unknown solid. We first chose a temperature to test the solid, which was about 50 degrees celsius. We chose this because the three solubility curves were very far apart at 50 degrees celsius, so we could easily tell the difference between the three solids. Next, we looked at the solubility curves at 50 degrees and used 5 grams of the solid because the solids were most  dispersed at that point. II. Definitions:   - Solute is the substance that is dissolved. - The solvent is the substance that dissolves the solute. - Solubility is the measurement of how much solute will dissolve in water.  III. Procedure:  First, we measured out 10 mL of water and po

I. Introduction:   In this lab the purpose was to measure the reaction between Alka Seltzer and water and to  determine the mass of the gas produced. What we did was, first we smashed up an alka seltzer tablet and put it inside a balloon. We then put the balloon over a graduated cylinder full of water and as the two substances combined, CO2 was produced and collected in the balloon. After all the gas had been created we measured the circumference of the balloon. We then emptied the gas and refilled the balloon with water until it had the same circumference. From this we were able to measure the water and find the volume. Through a series of calculations , we were able to conclude that the mass of CO2 was around 1.26 grams in our experiment. II. Data:  III. Calculations:  (Setup) IV: Analysis Questions:  1. Discuss an area in this lab where experimental error may have occurred. There are many instances where an experimental error may have occurred  For exam