Once the procedure was performed three times, the collected iron fillings mass was obtained by using the digital weighing scale. After removing the iron fillings, the sand was removed next by using the property of sand that the sand was completely insoluble in the water. The iron free solids mixture was dissolved in 15.00 mille liters of distal water and heated by using stove top in a beaker. The solution was mixed for a while the benzoic acid and salt were allowed to dissolve completely and solubility was enhanced by heating the solution. The solution was decanted into another beaker.
Add 1 mL of deionized water to the small test tube containing the precipitate and mix it and centrifuge it for 60 seconds. Then, add the supernatant into the boiling test tube and repeat this step one more time with another 1 mL of deionized water. Acquire a pair of metal test tube holders and heat the boiling test tube to evaporate the water for 15 minutes. Let is cool after and weigh it. Then, calculate a percent yield of zinc iodide and write a balanced chemical equation and determine the limiting
Place a funnel on the top of the buret and slowly add 5g of dry alumina. When all of the alumina has been added, rinse the inside of the buret with additional petroleum ether to flush down any alumina that may be stuck to the sides. Add another 1-cm layer of dry clean sand on top of the alumina. Drain the solvent from the column until the solvent is at a level just above the top of the sand. The column is now ready for the addition of the mixture to be separated.
After it was properly cooled, the solution was equally distributed to four centrifuge tubes and centrifuged for 5 minutes. The supernatant was poured out and the leftover clay was suspended in distilled water, then it centrifuged again and the supernatant once again was disposed of. The clay in the four centrifuge tubes was removed and put in a large beaker that contained the rest of the class’s clay. The next week, 40 mg of the clay made by the class, 39.0 mg of Bentonite clay, and 40 mg of charcoal were each added to a centrifuge tube along with 15 mL of Procion Red dye and shaken. The tubes were centrifuged for 2 minutes, then taken out and transferred to cuvettes using a pipet.
Data Tables: Step 1: Separating out the Iron Mass of weighing dish _0.7_g Mass of weighing dish and total mixture __5.4__g Net mass of the original mixture _4.7___g Mass 10-cm square paper __0.8__g Mass 10-cm square paper and iron filings _2.0___g Net mass of the iron filings _1.2___ g Step 2: Separating out the Sand Mass of weighing dish _0.7__g Mass of weighing dish and dry sand _1.7___g Net mass of the dry sand _1.0___g Step 3: Separating out the Benzoic acid Mass of cup __2.3__g Mass of filter paper _0.9___g Mass of filter paper and dry benzoic acid _1.6___g Net mass of the dry benzoic acid _0.7___g Step 4: Separating out the Salt Mass of cup and dry sodium chloride _3.3___g Net mass of the dry sodium chloride _1.0___g Substance Grams Percent of mixture Iron filings 1.2 30% Sand 1.0 25% Table Salt 1.0 25% Benzoic Acid 0.7 18% Conclusion: The purpose of this experiment was to teach me how to separate mixtures into their component substances. I learned to separation techniques based on the chemical properties of a substance. I separated sodium chloride, benzoic acid, silicon dioxide, and iron. I accomplished this by using the unique properties of each material and their differences in water solubility. Possible experimental errors include not properly removing all the iron/salt/benzoic acid from sand.
Then 5mL of HCl was added to copper to completely remove all traces of zinc. Once the bubbling had stopped, the rest of the liquid was decanted away from the copper. Then the copper recovery set up was put together using tubing, Buchner funnel, filter paper and suction flask. Then the filter paper was weighed before placing it in the funnel and wetted down. The aspirator was turned to medium high, and then the copper was poured onto wetted filter paper.
Method Part 1 1 Clean the surface of the 0.5cm piece of magnesium with a piece of steel wool 2 Place the magnesium into a test tube 3 Add three drops of detergent to the test tube 4 Add 2 cm of hydrochloric acid to the test tube. Set timer for 5 minutes and record your observations, including the height of the foam produced in a results table 5 Repeat the process for the
At first we dried the crucible in the flame three times and let it come to a constant mass by measuring the weight each time. To determine percentage of water in Epsom salt, we measured about 2g of the salt into three different, dried crucibles. The crucibles were first heated gently, then intensely to drive off all the water. The final data was reported as percent hydrate with 95% confidence level. RESULTS & DISCUSSION Weights of the crucible.
Gather all materials 2. Heat 200mL of water in the beaker for 90 seconds 3. Place the bulb of one thermometer just below the surface of the water 4. Record the initial temperature at the top 5. At the same time, place the second thermometer bulb just at about the bottom of the beaker 6.
Obtain 6 clean/dry test tubes and arrange in your test tube rack. Label the test tubes 1,2,3,4,5,&6 6a. Test tube 1: Add 5 drops of Barium nitrate solution. Test 2: Add 3 drops of Sodium chromate solution. Combine test tubes 1 and 2 into one test tube (pour test tube into test tube 1).