Laboratory equipment

Safety: Safety equipment such as Apron, glasses, inclosed shoes, and gloves (when handling the phenolphthalein indicator) a required to prevent unknown or possibly hazardous substances from contact with skin. Handle equipment such as volumetric pipets, burettes, and flasks with care as they can smash and harm the user. Due to the corrosive nature of phenolphthalein indicator…

Methods Column chromatography was set up using a 60 ml syringe clamped to a ring stand. The syringe was plugged using a small amount of cotton. An Erlenmeyer flask was placed underneath the column to collect any excess material. Eleven 20 ml vials were labeled numbers 1 through 11. Silica gel was measured to 42 ml using a graduated cylinder and then moved into a 150 ml beaker. A slurry was created by adding 50 ml of hexane to the beaker containing the silica gel. The slurry was stirred for…

To begin, we put 200mL of water with one drop of green food coloring into a pie tin. We then mounted the short candle into the clay in the center of the pie tin. After, we lit the candle, waited approximately five seconds and bottled the candle. Lastly, we waited for the flame to go out and measured how high the water rose in the bottle. This process was repeated for the medium and tall candle as well. Data Table: Height of Candle Height Water Rose in Bottle Short 4cm Medium 4cm Tall 4cm…

Umama abid Lab Partners: Olivia, Emily Ms. Olenick SBI4U 9/23/2017 Analysis The solution in the dialysis tube turned bluish black in color due to the transfer of iodine from the beaker to the bag which contains starch and glucose . The solution in the beaker turned brown after Benedict’s test ( table 1) . This indicates that the dialysis tubing was permeable to both glucose and iodine but not starch ( work helper, 2017) . Starch didn't pass because the solution in the beaker which…

Investigating if dissimilar sized candles have the capability of drinking equivalent quantity of water. Aim: The drinking candle science experiment is quite enthralling, as when performed, you'll observe a burning candle drinking up all the water kept beneath it due to the behaviour of the atmospheric pressure. The aim of this experiment is to investigate if unlike sized candles have the capability of drinking the same amount of water. Hypothesis: With all the information given on different…

The first step is to put on your goggles and apron. Then you need to gather your materials. You then need to make observation of the hydrate. Observe the color, state, texture, etc. to smell the unknown substance you need to waft the substance by slowly moving the smell of the liquid to your nose. Step 2- For the lab my group changed the way we were doing the experiment for time. This is the first way that we did it for trails one to two. First you need to get a beaker and mass it on a scale…

Caffeine is found in many products such as in pharmaceutical supplements, and beverages. Caffeine is mainly obtained from plant seeds or tea leaves. Extraction of caffeine is done to make decaffeinated coffee. There are three methods used to extract caffeine such as water extraction, supercritical carbon dioxide extraction and extraction by organic solvents. For this lab, the method used to extract caffeine will be by organic solvents. The purpose of the procedure is see how caffeine is isolated…

M & M Three oranges were cut in half and then placed over the juicer. The oranges were then pressed down, while being twisted allowing the juices from the oranges to be collected in the tray below. The orange juice in the trays were then poured into a 250ml beaker with cheese cloth on top of it. The cheesecloth caught the larger pieces of pulp from the oranges while allowing the juice to pass. The orange juice was then transferred into six 1.5ml centrifuge tubes. The six centrifuge were then…

CAUTION: It is best not to get dichloromethane on your skin. Gloves are to be worn during this experiment, if improper safety precautions are taken there is a possibility of irritation, and or burning of the skin. CAUTION: Gas will build up in the separatory funnel while you are shaking it, so you must vent the funnel occasionally to prevent the stopper from popping out, causing a mess and possibly getting dichloromethane on your skin. ~During the pre-phase of this experiment it is…

1)Hands were washed thoroughly with soap and water to ensure that no contamination on the coli-MUG tubes. The sealed plastic package was opened and coli-MUG tubes were removed. 2)Usually, inner fermentation vials contain only air. The assemblies was inverted and inner vials were allowed to fill with air, only if these inner vials contain any liquid. 3)Cap was removed and it was ensured that open end of the tube or the inside of the cap did not open. 4)Each of the given tubes were dispensed with…