After that, dissolve the sample in 2 mL of deionized water and shake the test tube for 1 to 1 ½ minutes to dissolve the solid. Place another dry test tube in a 50mL beaker and weigh it. Find a bottle of barium iodide and record the name and molar mass. Then, weight out either anhydrous barium iodide or barium iodide dehydrate into this test tube and dissolve is it in 2 mL of deionized water. Pour the contents of one of the test tubes into the other and a reaction should occur and you should see a white precipitate of barium sulfate form.
Obtain a clean-dry test tube. Place 0.3g of the unknown substance in the test tube. Next, add 10mL of distilled water to the test tube. Mix with a stirring rod until unknown is dissolved. 2.
2 minutes later, add the shrimp. Cook for 4 more minutes, then drain liquid from pot and pour contents over a clean, unused large garbage bag or newspapers. Serve with melted butter and
4) Ignoring step 3, after step 2, you can take the solution that you have created and pour it into a 100 mL beaker. Once the solution is in the beaker, turn on the conductivity tester and gently place it in the solution (try not to touch the bottom of the beaker). Record the results. 5) Now, take the beaker with the solution already inside and place it on a hot plate. Turn on the hot plate to a medium heat.
Obtain an Erlenmeyer flask that has a vacuum opening and attach the vacuum tube to it 8. Insert funnel and rinse the funnel with distilled water 9. Turn vacuum on and pour the pink solution into the Erlenmeyer flask, the precipitate should stay on top of the filter 10. Rinse the beaker out until all residue is gone 11. Try to rinse the precipitate in the funnel until the pink color is gone 12.
The aspirator was turned to medium high, and then the copper was poured onto wetted filter paper. Using distilled water to remove all copper from the beaker. Once completely on filter paper 6mL of acetone was added to the copper to help dry it out. The filter paper was then removed and set down to dry completely. Once dry the filter paper was weighed with the copper on it and subtracted from the original weight to see the amount of copper left after
Procedure: 1. Fill a beaker two-thirds full of water and add approximately 20 drops of IKI. Write down the solution's color and record the mass of the bag. 2. Do an initial Benedict's test on the 15% glucose/1% starch and the beaker solutions for glucose by putting some of the solution and a roughly equal amount of blue Benedict's solution in a test tube, placing the test tube in boiling water for 90 seconds, and observing whether or not the solution changes color from blue.
After cork the test tube and clamp it as it cools, and observe the recrystallization process beginning. After the tube gets to about room temp, cool it in ice and stir the crystals. Then you should begin removing the excess water with the Pasteur pipette. After doing so the cool the tube in ice and add a few drops of ice-cold ethanol to the tube to remove the water from the crystals. Next, put the test tube in a beaker of water and place it in the sand bath.
first aide- move victim to fresh air, administer o2, remove all contaminated clothing, if in contact with eyes flush for 20min and wash the skin with soap and water. Immediately cool burned areas with warm water and don't remove any clothing stuck to the skin. Carbon monoxide- gas toxic and flammable. Extremely toxic when inhaled or absorbed though the skin. Isolate area for 100 meters in all directions.
Measure 0.10 g of copper powder within 0.098 to .102 g 2. Put the copper into a 140 mL beaker and move the beaker to the fume hood. 3. Slowly add 2mL of concentrated nitric acid (8M) to the copper and swirl the beaker so all the copper can react with the nitric acid. 4.