After that, dissolve the sample in 2 mL of deionized water and shake the test tube for 1 to 1 ½ minutes to dissolve the solid. Place another dry test tube in a 50mL beaker and weigh it. Find a bottle of barium iodide and record the name and molar mass. Then, weight out either anhydrous barium iodide or barium iodide dehydrate into this test tube and dissolve is it in 2 mL of deionized water. Pour the contents of one of the test tubes into the other and a reaction should occur and you should see a white precipitate of barium sulfate form.
c.2 grams KI. d.10 mL of 2M H2SO4. 5.Mix the ingredients in the Erlenmeyer flask completely. 6.Immediately begin to titrate with thiosulfate. 7.Titrate until the solution gives off a pale yellow color.
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.
Eggshell Titration Lab Report LIU-1 Mr. Silva Beko Liu February 25, 2012 Purpose: Eggshells are composed in part of calcium carbonate. Calcium carbonate reacts with an acid to produce carbon dio xide, water, and a salt. The calcium carbonate in the sample eggshell will be determined by means of an acid/base back-titration. Procedure: 1.Wash an empty eggshell with distilled water and carefully peel all the membranes from its inside. Place all of the shell in premassed breaker and dry the shell in the drying oven at 110 degree Celsius.
Pour all the filtrate and washings into a 250cm3 volumetric flask. Make up to 250cm3 with 1.0mol dm-3 sulphuric acid(VI) acid. Stopper the flask and invert several times to thoroughly mix the solution. 5. Fill the burette with 0.005mol dm-3 potassium manganate(VII) solution.
Lab Report Example Lab 16-1: How much calcium carbonate is in an eggshell? Elizabeth Shanor April 25, 2005 Purpose: Eggshells are composed in part of calcium carbonate. Calcium carbonate reacts with an acid to produce carbon dioxide, water, and a salt. The calcium carbonate in the sample eggshell will be determined by means of reaction with a carefully measured quantity of hydrochloric acid present in excess. The excess acid will be reacted with sodium hydroxide to determine how much acid remains.
When the students arrived to the classroom, quickly they measured the mass of the eggs, and discussed about the solutions. This is a way to demonstrate osmosis. Experiment: In the experiment, students needed to fill four jars; two with distilled water, one with vinegar, and other one with syrup. One of the jars with distilled water was to remove the shell of the egg; this process had to be done two more times, since the students are using three eggs. Students need to put the eggs, after their shells have been removed, in the corresponding jars and leave them for two days.
First ~2 g of the previously prepared soap is dissolved into 100 ml of boiling distilled water. Next the same process is followed for dissolving the detergent. Before progressing the pH of both the soap and detergent is determined. Once this is done, 4 drops of mineral oil is added to each of
remove it from flame, add corriander leaves and mix all together. then let all cool down for 10 minutes. (5) On cooling, transfer them to a mixie jar and grind into a smooth paste by adding 1/8 cup of water. with set 2: (6) Heat another pan, add one tsp of oil, following it add very finely chopped onion. fry it till it turns light brown.
Apparatus: Weighing balance, beaker 100ml, paper towel/ filter paper, aluminium foil, marking pen, labeling pen, measuring cylinder 100ml and stopwatch Variables: Variables | Method to handle | Independent: The concentration of the sodium chloride solution. | Used different concentration of sodium chloride such as 0%, 5%, 10%, 15%, 20%. | Dependent: The difference in mass of the quail’s egg | Weigh the mass of the quail’s egg using a weigh balance before putting it into the sodium chloride solution and after 24 hours being in the solution. | Controlled: * Type of egg * The type of solution that cover the egg. * Use the same volume of sodium chloride solution.