3.0015 G Of Salicylic Acid Lab Report

tralization solution and centrifuging it for 5 minutes. The Wizard miniprep kit is used to bind the

First, a 100 mL graduated cylinder was obtained and filled with 35 mL of water. A pipet was used to attain a more accurate amount of liquid. The water was then poured into a beaker, which was weighed on an analytical balance. Next, an Alka-Seltzer tablet was obtained and the weight measured using the same balance the weight of the beaker was measured on. When both masses were recorded, the tablet was dropped into the water. The liquid was swirled to allow for the tablet to dissolve completely. After the fizzing had stopped, the beaker was once again weighed and the mass was recorded. Each step was repeated seven more times for a total of eight trials. However, with each trial the liquids added to the beaker changed. In each new trial, an additional 5 mL of vinegar was added and 5 mL of water was taken away. Thus, beaker one had 0 mL of vinegar and 35 mL of water; beaker 2 had 5 mL of vinegar and 30 mL of water; beaker 3 had 10 mL of vinegar and 25 mL

2. Suck up 10.00mL of 0% sugar (distilled water) into a pipet and move the liquid to an empty beaker.

3. A glass funnel was placed in the beaker, along with the elodea (as shown in the apparatus above)

Before I started, I added a filter paper into the apparatus and put the funnel in the filter flask strong enough so that the neck fits into the rubber washer. Then, I poured water into the top to moisten the filter paper and used the _____________ to get all the water to bottom before pouring in the aspirin product into the filter paper. I slowly pumped the water into the bottom until one crystals were left and used the spatula to transfer any crystals left in the flask. With the ice cold water again, I rinsed the inside of the flask and transferred the remaining crystals into the funnel. Then, I added two 10 mL portions of cold water and pumped all the water to the bottom. Last, I took out the filter paper with the aspirin by using a spatula and put them on a paper towel to allow them to air dry over the

The known solution should then be allowed out of the burette, into the conical flask. At this stage we want a rough estimate of the amount of this solution it took to neutralize the unknown solution. The solution should be let out of the burette until the indicator changes color and the value on the burette should be recorded. This is the first (or rough) titre and should be disclosed from any calculations.

Pour everything in the beaker into the evaporating dish, using a Popsicle stick to scrape the sand into the evaporating dish. 5. Put the wire gauze onto the ring stand and place the evaporating dish in the center of the wire gauze, then use a striker to light the Bunsen burner with a low flame and place the Bunsen burner on the base of the ring stand under the wire gauze, once the water boils, use beaker tongs to remove the evaporating dish from the ring stand and set it on the desk, then turn off the Bunsen burner. 6. Put the filter paper in the funnel and place the funnel over the 20 ml beaker and using the beaker tongs, carefully pour the salt and water from the evaporating dish into the funnel until there is mostly sand left in the dish and wait 3 minutes for all the salt and water to go through the funnel and into the 20 ml beaker, then take the filter out of the funnel and using the first Popsicle stick scrape off the melted stearic acid onto paper towel 3.

Emptied one presidents choice black tea bag in the 500ml beaker and stirred until the color turned from cleat to a translucent

The flask was then inverted ten times to ensure the mixture was thoroughly mixed. Step two- Now that the vinegar solution is diluted some was then poured into a beaker. 25ml was then taken out from the beaker using a pipette. It was then poured into a conical flask.

Once the solution was refluxed for 5 minutes, it was then cooled for 5 minutes to room temperature with the addition of acetic acid and [acetic acid to quench (add H2)]. After the addition of acetic acid, the solution turned yellow and formed a precipitate. The solution was placed on ice for 10 minutes. Once the solution had been cooled, the solution went through a vacuum filtration until the precipitate was completely dried. The precipitate recovered is the luminol, which was used as the

The experiment this week had two different purposes. The first is to teach us about freezing points. This lab was designed to show us the freezing point of a pure solvent, in comparison to a solvent in a solution with a non-volatile solute. The second goal of the experiment is to teach students about osmosis. In the experiment, we got to observe osmosis as well as understand dialysis.

This will let the filtrate through but leave the sand behind. The filtrate is the liquid that passes through the funnel during filtration. In this experiment, the saltwater solution is the filtrate. The solution remaining in the beaker will then be heated over a Bunsen burner. As the solution is being heated, the water in the saltwater solution will evaporate off until only the salt is remaining in the beaker. Evaporation is a process where a soluble solid is separated from a liquid. The lab ends with the sand on the filter paper, and the salt remaining in the beaker.

1. Fill one of the 1L beakers halfway with water at room temperature. Half fill a second beaker with water of about 40(C, and half fill a third beaker with ice water.

Stirring the mixture gently till is almost at boiling point; drops of silver nitrated were added to check if the mixture was entirely precipitated. After through precipitation, the mixture was placed in drawer to cool down. In the meantime, the sinister glass crucible was weighed on the balance. After the mixture put in the drawer has cooled, the vacuum filtration apparatus was put together and the supernatant liquid was poured into the glass filter leaving the precipitate in the beaker. This process was done again when more amount of 0.01M HNO3 was added to thoroughly filter and transfer the precipitate in the crucible. The flask was cleaned after detaching from the crucible and then reconnected to the crucible to be filtered out one more time with 0.01M HNO3. This time, the aliquot of HNO3 was put in a test tube and given to the TA to test for no turbidity. After the TA’s approval, the apparatus was reconnected and three 5ml portions of acetone washed the

Next rinse out the beaker with small amounts of distilled water and transfer the washings to the volumetric flask to ensure none of the solution is wasted affecting the end result.