Dissolve the salt in 60 ml of tap water. Add 30 ml 6 M Hcl and stir the mixture with a glass rod. Add 12 g solid Nacl to the solution and stir the mixture for about 2 minutes. Support a 250 ml separatory funnel on a ring, making sure that the stopcock is closed and that a clean beaker is placed beneath the exit tube. Transfer the aqueous solution from the beaker to the separatory funnel.
We set those materials in a neat, orderly fashion on our table. Next, we put on our safety goggles. Next, we placed one Magnesium metal ribbon into the 125 milliliter Erlenmeyer flask and we poured 20 milliliters of hydrochloric into the graduated cylinder. Then we placed the 125 milliliter Erlenmeyer flask with the magnesium, the rubber stopper, and the graduated cylinder with 20 milliliters of hydrochloric acid onto a scale. After we got the different masses, we added them up until we got a final total and we put that mass into a table.
Ensure that solid is completely dissolved using a stirring rod. Next, a 10 mL beaker is filled with 3 mL of HCl and measure 10 mL of ionized water into a 140 mL beaker. Carefully turn on laboratory burner and start cleaning the Nichrome wire by dipping it into concentrated HCl acid. Hold the Nichrome wire on top of the flame and repeat the step until the wire doesn 't show any color. When the wire is clean, dip the wire again with some of the acid and dip it into the solution with the unknown compound in it.
We added sodium carbonate until the pH of the mixture was 8. After neutralize, we collected benzocaine by vacuum filtration. We used a Buchner funnel to collect benzocaine. We used three 10 ml of water to wash the product. After the product was dry, we weighed, calculate the percent yield and determined the melting point of the product.
Put 1 capsule of the bioflorin into each of the test tubes and tap them until the capsule dissolves. Screw the liquid onto both test tubes to make sure that they are sealed. You now have to wait for approximately two days, in order to obtain satisfying results. Light the candle/put it on fire. Fill the third test tube with approximately two millimeters of Ethanol.
The materials that we used when conducting this experiment are: dissecting microscope, 3 petri dishes, C. elegans (male, female, and hermaphrodites), worm pick tool, agar, Bunsen burner, Parafilm, incubator, and flint spark lighter. The methods of this experiment are really simple. When we started the experiment we all washed our hands and wore gloves. Each group member did their part to conduct and successful experiment, one group member plugs the Bunsen burner to the gas pipe and turned on the gas, then used flint spark lighter to set the flame on the Bunsen burner. While the second group member is setting the dissecting microscope and making sure the lenses are clean.
Ashley Wilson 5 March 2018 General Chemistry Lab – Section 202 Experiment 7- Copper cycle Purpose: A series of reactions that convert a piece of copper metal, via several different copper- containing compounds, back into its original elemental form will be observed. Copper wire was dissolved in nitric acid. NaOH was then added to the dissolved copper solution, precipitating into Cu(OH)2. The precipitate was then placed on a hot plate and stirred until it became CuO. After sitting , the CuO was decanted twice, and H2SO4 was added.
Add deionized water to the volumetric flask to the 250ml mark on the volumetric flask. 13. Read the volume from the bottom of the meniscus. 14. Swirl the solution to ensure that the oxalic acid crystals are properly dissolved in the deionised water.
Exercise 2 began with measuring the milliliters needed to fill a coffee mug and measuring the liters in a gallon. Then we went to the sink and filled a graduated cylinder with 70 ml of water and then placed a pencil in the water. Our lab partner, Temi had to use both of her hands to push the pencil in the water in order to completely submerge it, because it kept floating upward. After completing these steps, we then calculated and recorded the volume. Once we finished this, we then repeated steps (a-d) to measure and record the rock 's volume.
Methanol was filled in a test tube and placed into a water bath to heat up. 12 Drops of the Methanol were then added to each flask until the crude caffeine had completely dissolved. 13. The solution was then filtered and the residue collected in a filter paper. It was left to dry and
Then, the pipet was rinsed with distilled water. The bulbs were then attached to the pipette; filling and dispensing water were practiced using both bulbs. Furthermore, the 250-mL beaker was weighed, and its mass was recorded. After that, the Erlenmeyer flask was filled with 100 mL of distilled water. The temperature was recorded.
The evaporating dish was placed on top of the wire gauze and covered with the watch glass. The Bunsen burner was used to heat the water to a boil until the water had evaporated, leaving a dry, white solid (salt). The evaporating dish with the watch glass containing the salt residue was then weighed and recorded to 0.001 g. The mass of the evaporating dish and watch glass containing the salt residue was subtracted from the mass of just the evaporating dish and watch glass which gave the mass of the
Next comes the refining process. Through this process I am refined further to remove any other impurities because I must be at least 99% pure lead. I am put into a kettle at 330°C eventually causing me to rise to the top. Finally, after this long process, I am put into a block to cool and harden.
This procedure occurred in the presence a Bunsen burner. The inoculation needle were placed within the open flame 15-20 second in order to sterilize the needle and prevent contamination. The needle was allowed to cool 5-10 second before inoculation. Using aseptic transfer technique the needle was used to gather up some of the colonies on the plate, making sure not to touch anything else with the needle. The test tube was uncapped and the lips of the test tube was passed through the open flame three times.