Calorimetry Lab

The mass of salt (.26 grams) was then divided by the total mass of mixture (3 grams) and then multiplied by 100 to get 8.7% salt. The mass of sand was determined by subtracting the 100mL beaker with filter paper and sand (54.57 grams) by the the empty 100mL beaker with filter paper weighing 52.74 grams, to get 1.83 grams of sand. The mass percent of sand was determined by dividing the 1.83 grams of sand by the mass of mixture (3 grams) and multiplying by 100 to get 61%

Weigh the beaker with water in it, record this value in Data Table 1 and subtract the mass of the beaker to get the mass of the water. Record this value in Data Table 1.

Add 100 mL of water to a plastic cup Weight the cup and the water. Find the combined mass of the cup, water, and the tablets. Drop the tablets of Alka-Seltzer into the water. Stir gently until almost all the bubbles are gone. Record the temperature and pressure of the room.

21) After all of the solid dissolves, move the flask from the hot plate and allow it cool to room temperature. After a while, crystals should appear in the flask.

9.Repeat the procedure with a new mass of baking soda. Before beginning, rinse the reaction vessel with water. Refill the graduated cylinder with water. Check water level in collection box so it has room for the water from the graduated cylinder.

4. Label three 500mL beakers with 1% NaCl and fill them with 400mL of the 1% NaCl solution. 5. Place one 10% NaCl cell into the 400mL of 50% NaCl solution. 6.

XII. Take the 250 ml beaker to your lab bench. Set up a gravity filtration with a plastic funnel, folded wet filter paper, and an Erlenmeyer flask. Pour the content in the 250 ml beaker slowly through the filter paper. Wash the filter paper with deionized water. Dispose of the filtrate in the proper labeled waste container.

Figure out the height the ring should be above the watch glass by hanging the (empty and clean) soda can by the tab on the stirring rod and set it up so the bottom of the can is about 2-3 inches above the watch glass (or sufficient space so the food will have enough space to burn without the hitting the can). After setting up the height of the ring on the ring stand, using the milligram scale add about water to the soda can and hang the can back up on the stirring rod. Record the mass of the water added in grams, as well as the temperature of the water in degrees Celsius which is determined using the temperature probe. Weigh the chosen food with the milligram as well and record the mass. Put the food on the watch glass and confirm the height of the ring on the in degrees Celsius ring stand is fine.

Once the filter paper is in the funnel, moisten it with distilled water. Position beaker 2 underneath the funnel. In order to begin filtering the mixture, decant the supernate into the funnel, guiding it with a stirring rod. With distilled water, place the remaining solid in the funnel. Once all of the solid is in the funnel, add some distilled water to the funnel, draining into beaker 2.

8. Repeat step 7 with H2SO4, except that you should use a 10 mL graduated cylinder of H2SO4 and adding 15 mL water.

Crystals were collected in a Buchner funnel, washed with alcohol, then ether, then transferred into a sample tube for storage.

Following this, we heat the beaker of the solution on a hot plate under a hood, for 2 to 3 minutes. By this time, most of the precipitate will have settled to the bottom of the beaker. We watch the reaction carefully and stir it slowly to reduce splattering. After the

Introduction: The purpose of the experiment itself was to display and investigate aluminum recycling while having the opportunity to construct a balanced ionic equation as well as percent yields. Students are able to complete these steps while the reaction takes place in front of them. This abstract will cover the procedure, materials, and discuss the results yielded from heating aluminum pieces and combining them potassium hydroxide and water.

precipitate; then pour over the solid in the funnel. Finally, pour two 10-mL portions of

Measure 500ml of tap water in the 500cm3 beaker, then measure 5g of sodium hydrogen carbonate using the 50cm3 beaker and weight scale and place in the beaker of water, using the glass rod to dissolve it into the mixture.