3 Test Solvents

Step 4: Place the test tubes into separate coffee cups to maintain the upward position. Add 2 mls of the catalase solution to each of the test tubes and then place tubes1, 2, and 3 in the conditions described above. For test tube 4, fill the coffee mug half full of boiling

Perform the following with three 0.05g samples of unknown and the following solvents: methanol, water and toluene

Substance A and B were weighed; Substance A weighed 0.502 g and substance B weighed 0.503 g. Both substances were put into two different test tube with approximately 8 ml of DI water into the test tub. Substance A and B were stirred and B dissolved while A did not. This shows that B is soluble in water compared to A. Thus, shows that B is soluble in water than A. The reason why B is soluble in water is because it has a higher dipole moment than A. With a higher dipole moment, it shows that it is soluble in water since it is polar and the bonds were easily broken.

or not mixed you will then have to determine its VOCs and exempt –solvent content from the

The purpose of this lab is to separate a mixture and determine the percentages of each of the ingredients. Each substance will have a different boiling point due to its intrinsic properties and from that, we will be able to determine the purity of different products as we evaporate off the next level of product.

A small beaker was placed under the arm of the distillation head to catch the distillate. Foil was wrapped around the neck of the round-bottomed flask and a wet paper towel was wrapped around the arm of the distillation head to create a condenser. The flask was heated gently so that the distillate dropped at a rate of two drops per minute. The temperature was recorded as every drop was collected. The distillation began at around 55.0 ℃. The distillation was stopped after 29 drops were collected to prevent the solution from being distilled to dryness. See attached data. The known boiling point of 1-butanol is 117.5 ℃ (Lemonds). The known boiling point of 1-propanol is 97 ℃ (Thiyagarajan). The known boiling point of acetone is 56 ℃ (Forss). The known boiling point of 2-butanone is 79.6 ℃ (Jiang). For unknown #3 the boiling point of the first substance seemed to be around 56 ℃ and the boiling point of the second substance seemed to be around 111 ℃. Therefore unknown #3 seemed to be a mixture of acetone and 1-butanol.

Repeat steps 4–11 two more times. Be sure to record your observations in the data tables in your lab notebooks, in the rows for trials 2 and 3. (Can you separate the dyes of grape soda using space sand?). The entirety of the Procedures.

The pipette was used to transfer 8 mL of the 0.5 molarity solution into the graduated cylinder. Distilled water was added to raise the bottom of the meniscus to the 20.0 mL line and the solution was transferred into the beaker after it was rinsed with the solution. The pipette was used to take a small quantity of the solution and rinse and then fill a test tube with the solution. The amount of 0.2 molarity solution needed to create 20.0 mL of 0.1 molarity solution was calculated as 10.0 mL. The pipette was used to transfer 10.0 mL of 0.2 molarity solution into the graduated cylinder and distilled water added until the bottom of the meniscus reached the 20.0 mL line. The solution was transferred to the rinsed beaker and then a portion placed into a test tube that had been rinsed with the solution. The amount of 0.1 molarity solution required to create 20.0 mL of 0.05 molarity solution was calculated to be 10.0 mL. The pipette was used to transfer 10.0 mL of 0.2 molarity solution into the graduated cylinder and distilled water added until the bottom of the meniscus reached the 20.0 mL line. The solution was then placed into a beaker that had been rinsed with the solution and then into a rinsed test

To be able to complete this experiment various lab instruments were needed. This includes the use of beakers, test tubes, a metal spatula, wooden splints, and a Bunsen burner. The analysis begins with determining the physical traits of the compound. Then 0.15 grams of the unknown substance is mixed with 3 mL of distilled water to test

The purpose of using solubility analysis on an unknown is to narrow the possible unknowns given based on the solubility analysis. Acetone was a control for ketone and was soluble in water. Hexanal was a control for an aldehyde and was insoluble in water due to intermolecular forces, such as an increased amount of hydrophobic area rather than hydrophilic area. As a result, by identifying the solubility of the

A solute and solvent were chosen from the list to start with. Around 10 mg of solid and 0.25 mL of solvent were added to a clean reaction tube. A pipette was useful in transferring the solvent to the tube. The mixture was stirred with a glass stirring rod. If the substance was completely dissolved at room temperature, a few drops of water would then be added to see if the solid precipitated.

In a test tube, 0.5mL of the sample will be added with 0.5 mL of water and shaken vigorously. Take note for its solubility by parts (0.5mL is one part). Keep adding parts of the solvent until the sample is soluble. If not, add until ten parts of the solvent and determine its solubility. To separate test tubes, water will be replaced with ethanol, chloroform, ether, and acetone as solvents. Same procedures were

The mass of the product was recorded. To test for the alcohol, 3 test tubes were labeled for cyclohexanol, cyclohexene and the product. 5 drops of Ammonium cerium (IV) was added into all the three test tubes. In the first test tube, 2 cyclohexanol was added.

In our third experiment, we observed and recorded different household chemicals and their reactions with chemical reagents. The purpose of this lab was to sharpen our powers of observations and deduce from observed reaction to identify household chemicals. The investigation allowed us to make comparisons of reactions and pattern recognitions. The four household chemicals used in the experiment are Lysol Toilet Bowl Cleaner, baking soda (Arm & Hammer), Vanish Crystal Bowl Cleaner, and Clorox Liquid Bleach. These chemicals were reacted with five reagents including blue food color, 0.1 M Silver nitrate, 0.1% thymol blue, 1.0 M Calcium chloride, and 6 M hydrochloric acid.

Scrunch up a small piece of aluminum foil and put it in a second test tube. Set it in the test-tube rack. With the graduated cylinder, quantify 2 mL of Solution D and add it to the test tube.