Lab Report: The Synthesis Of Alum

6. Rinse a 500 ml volumetric flask with deionized water. 7. Label the volumetric flask so you know which solution is in it. 8.

Using the equation m = ΔTf/Kf , the molality of the unknown solution was found. Then, moles of unknown were calculated, which was used to calculate the average molar mass of unknown. Theory: After the experiment was completed, the data

Materials 1. Clean and dry 250 mL beaker. 2. Determine the mass of 2 Alka-Seltzer® tablets. 3.

The second step that you will need to do is to fill the boiled water up in an unblemished glass cup that reaches the exact amount of sixteen ounces. The third step that you will need to do is to get the recording of the water’s temperature. The fourth step you will need to do is to place two tablets of Alka-Seltzer in the water. The fifth and final step that you will need to do is to get either a stopwatch or a timer and calculate the specific amount of time it will take for these tablets of Alka-Seltzer to completely

The last goal was to determine the percent yield of a product formed during a reaction with the unknown compound. Experimental Design The first day of lab consisted of various preliminary tests that helped identify the unknown compound.

The actual yield of the reaction was 4.411 grams of copper and was obtained through the experiment

I. Purpose: To experimentally determine the mass and the mole content of a measured sample. II. Materials: The materials used in this experiment a 50-mL beaker, 12 samples, a balance and paper towels. III.

Pour a sufficient amount of room-temperature water (about 16 oz) into a large glass. 2. Add a tablespoon of salt to the water and stir well. 3. Drop an Alka-Seltzer tablet in an empty water bottle.

The final product weight for percent yield was only the solid E product, which missed one half of the final product produce. If both products were weight, the percent yield would have been larger that it was. Instead of 22.33%, it could have been 44.66%. To prove that both products were obtained, but only one of the two products was analyze, a TLC plate of the DCM layer, that contains both products, and of the final product, was obtain.

The percent recovery of the copper was calculated using the equation, percent recovery = (the mass of the copper recovered after all the chemical reactions/the initial mass of the copper) x 100. The amount of copper that was recovered was 0.32 grams and the initial mass of the copper was 0.46 grams. Using the equation, (0.32 grams/0.46 grams) x 100 equaled 69.56%. The amount of copper recovered was slightly over two-thirds of the initial amount.

Stop the timer as soon as the reaction has stopped taking place and no remaining tablet is visible. Record the data. Empty out the beaker and water. Repeat steps 18-26 three more times, until four trials have been completed in total.

Clamp the flask firmly to the ring stand and add the Buhner funnel with a rubber funnel stopper. 3. Get some filter paper and make sure it fits in the funnel. 4. Place the filter paper in the funnel.

In order to find the amount of a product made during a double displacement reaction, the product has to be separated from the solution. From this number of moles of precipitate can be calculated. From there the number of moles of reactants can be calculated using the mole ratios of the particular reaction that occurred. As seen in Table 5 it is shown that by finding out the number of moles of the unknown, the molar mass of the unknown can be calculated. From the found mass of the unknown compound, the mound of the original ion can be found.

Question3: Experiment 3 The unknown acid sample was 1 • Monoprotic Acid Trails Initial NaOH solution (mL) final NaOH solution (mL) The volume of NaOH to titrate the acid (mL) Amount of Unknown Acid sample 1 (g) The moles of the Unknown Acid (mol) Molar mass of the Unknown Acid (g/mol) A 3.38 28.31 24.93 0.150 0.0026 57.69 B 0.18 29.32 29.14 0.175 0.0029

Once dissolved, fill the rest of the volumetric flask up to the line on the neck of the flask. Again mix the solution. Use four, 10mL volumetric flask, and label them from 1-4. Add approximately 2mL of copper sulfate pentahydrate into flask 1, 4mL to flask 2,