Urea is an organic compound with the chemical formula (NH2) CO 2. It is highly soluble in water and therefore, a good way for the human body to expel excess nitrogen.Cinnamic acid has the formula C6H5CHCHCOOH; is a white crystallin acid slightly soluble in water. Materials: This lab consisted of two solid organic compounds Urea and Cinnamic acid. It also consisted of the Mel-temp, a pestle, a spatula, a balance weighed in mg, and tubes to put the organic compounds in. Procedures: First, we were each assigned a group number.
Explain your answer. It is a combination of water and isopropanol and is homogenous. Procedure: Cut 3 strips of coffee filter. Be sure that the strips are much narrower and slightly taller than the drinking glasses. In the center the strips, about 3 cm from one end, place a dot of the marker to be tested.
Hypothesis: Using melting points can help determine the difference in total carbon atoms and branches between two or more compounds. Materials List: 1 Spoon 1 Paper towels 3 Small rubber bands 2 Clean sheets of paper 1 Beaker, 100 mL, glass 1 Burner-fuel 1 Burner-stand 1 Goggles-Safety 1 Magnifier, dual 1 Thermometer-in-cardboard-tube 1 Capillary tubes-3/pack 1 Tetracosane Crystals - 0.2 g in Vial 1 Tetradecanol Crystals - 0.2 g in Vial Procedures: Prior to beginning the lab exercise, read the instructions carefully. Begin by setting up a derivative melting point table to collect the data accumulated during the exercise. This lab uses heated water so be sure to follow safety procedures carefully. While conducting this laboratory experiment, be sure to use minimal amounts of each substance in order to create the habit of using only the amount necessary.
Objective/Purpose The objective of a distillation process is to demonstrate methods for purification of volatile compounds (compounds that can be converted to gas phase at reasonable temperatures without decomposition) and to demonstrate that gas chromatography may be used to quantitatively determine the relative proportions of volatile compounds in each sample. Using three different separating and analyzing methods, we will be able to study what compounds were in our tomato paste. Materials - A glass distillation set up (including all of the little pieces) - Heating mantle - Thermostat - 100 mL round bottom flask - Beakers - Graduated cylinder - Stirring rod - TLC silica gel plates - Jar - Dichloromethane - 50/50 % hexane and acetone - Scale for weights - 7:1 hexane and dichloromethane mix for TLC - Tomato paste - Funnel Filter - Wool - Heating mantle Methods Weigh out approximately 10.00 grams of tomato paste. Then, retrieve 50/50% hexane/acetone. Next, get 2.00 grams of MgSO4 and combine it with the paste.
all-purpose flour. The ingredients for that buttery flakey crust; 1 cup butter flavored shortening, 2 ½ cups all-purpose flour, 2 tbsp. sugar, 1 tsp. salt and 1/3 cup ice water. Now it’s time to do the mixing!!
Gravimetric Determination of Sulfate Purpose The purpose of this lab is to determine the percentage of sulfate in the hydrate by precipitating the sulfate as barium sulfate. Materials Filler paper Sodium sulfate Graduated cylinder Bunsen burner Watch glass Beakers (250 mL, 400 mL) Rubber bulb Graduated pipette Beaker tongs Funnel Filter Paper Sodium Sulfate Drying oven Wash bottle Stirring rod Silver nitrate Hydrochloric acid Distilled water Small test tube Procedures First, .4861 grams of sodium sulfate was placed into a clean 400mL beaker. Exactly 200mL of water and 1mL of HCl was added to the same beaker. A watch glass was placed on the beaker and the solution was heated using the Bunsen burner to a gentle boil. The watch glass was removed with the beaker tongs.
Title: Separation of a Mixture of Solids Purpose: To learn about separating solids and how this happens. By separating the solids one will be able to tell the difference between a mixture and a pure substance. Procedure: Four main steps. Separating the iron from the mixture with a magnet. Separate the sand by boiling water and pouring the water off, then move on to separating the Benzoic acid using filter paper.
This drink is best served in a glass jar with the strawberries and basil leaves floating on top. Ingredients • 1 cup basil leaves • Tea bags • 4 cups Boiling water • 10 large strawberries (chopped) • Crushed ice Instructions • Place the tea bags in the boiling water and discard them after 15 minutes • In another container, boil 1 cup water along with the basil leaves and some sugar. Simmer for 10 minutes. • Remove this container from the fire and add the strawberries. Now refrigerate until chilled.
Procedure Preparing of Medium Agar Materials and apparatus * Distilled water * Nutrient agar powder * Autoclave machine * Petri dish * Hot plated * Conical flask Procedure 1. 500 ml of agar solution was prepared by using 500 ml distilled water and 10 g of nutrient agar powder. 2. Both distilled water and nutrient agar powder was poured into conical flask. 3.
PROCEDURE 1. Get the following equipment for your group: burette pipette syringe with piece of rubber tubing attached 1–250 mL beaker 3–100 mL beakers grease pencil stand and burette clamp Each beaker must be clean and dry. Label one 100 mL beaker “ACID”, one “BASE” and one “RINSE”. 2. Pour about 80 mL of NaOH solution into the BASE beaker.