1.) How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? The way the fluted filter paper is folded hastens filtration because it increases the surface area of the filter paper‚ giving the solution more area to go through. A piece of wire is placed to avoid build-up of pressure‚ and easily pour the solution without spilling. 2.) Enumerate 2 techniques that can help
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Purposes of Experiment: To synthesize a transition metal complex‚ potassium tris (oxalate)ferrate(III) trihydrate in a two step process‚ to learn new laboratory techniques such as decantation‚ recrystallization‚ gravity and suction filtration. Also the purpose of the experiment is to determine the actual‚ theoretical‚ and percent yields of product‚ and characterize the final compound by determining the number of waters of hydration by gravimetric analysis List of Observations: After adding
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experiment is to examine the percent yield of a precipitate in a double displacement reaction. A solution of calcium citrate and sodium carbonate were mixed together‚ then the products were filtered out as so only the precipitate remained. The filtered paper was then dried and the mass of the precipitate in the experiment divided by the theoretical mass of the precipitate from the calculated gave the percent yield. The percent yield that was acquired is about 69.1%. The chemical reaction that took
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DCM the Panacetin lumps were crushed with a stirring rod. Next a fluted filter paper was pre-weighed. The filter paper weighed around .860 g. Gravity filtration was then used to filter the mixture into a 125 mL collecting flask. The mixture was filtered in order to separate the crude sucrose from the mixture. The original container was then rinsed through the filter paper again with 5 mL of DCM and the mass of filter paper containing sucrose was measured after it was dry. The last step was to perform
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beakers; filter papers; funnel; wires; retort stand; scales; 3 soil samples; distilled water. Method 1) Pour 100 mL of 0.1 mol NaCl solution onto beaker‚ place electrodes in solution and run 4V through the circuit as shown in the following diagram 2) Record amperage from ammeter. 3) Repeat steps 1 & 2 for 0.5‚ 1‚ 1.5‚ 2‚ 2.5‚ 3‚ 3.5 mols NaCl solution. 4) Observe results for a pattern linking salt level and amperage. 5) Mix soil and water to dissolve salt from soil. 6) Filter mixture to
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Presence of Insecticides & Pesticides in Fruits & Vegetables SCHOOL : K .V N T P C CHEMISTRY PROJECT REPORT STUDY THE PRESENCE OF INSECTICIDES AND PESTICIDES IB FRUITS AND VEGETABLES Name : Class : Reg. No : Examiner Teacher-in charge. CERTIFICATE This is to certify that the project was done by …………………………… Reg. No ……………….. Is in partial fulfillment of Chemistry Practical Examinations
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disk and cover with a piece of filter paper. • CALIFORNIA BEARING RATIO 4. Compact the soil according to ASTM D 698 or ASTM D 1557 Method B or D. 5. Remove the collar‚ trim the sample smooth and patch any holes that may have formed. 6. Remove the base plate and spacer disk‚ weigh the mold + compacted soil and compute wet mass‚ density and unit weight. 7. Repeat Steps 4 through 6 for the second mold which will be soaked. 8. Place a piece of filter paper on the base plate‚ invert the
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Ryan‚ Chace Aim: To find out if you can make glue from milk. Materials: 100ml of milk White vinegar 25ml Baking soda 5g Two 250ml beakers Stirring rod Spatula Bunsen burner Tripod‚ gauze mat and heat proof mat Filter funnel and filter paper Matches Two pieces of paper Method: 1. the tripod‚ gauze mat‚ and heat proof mat were set up. The Bunsen burner was then lit. 2. A 250ml was filled one third and milk was then added. 3. 25ml of vinegar was then added to the mixture. 4.
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An experiment was run to determine which enzyme (pectinase‚ and cellulase or combinations of the two enzymes) maximizes juice production and would be most cost effective. The proposed hypothesis was if the enzyme‚ pectinase‚ is added to apple juice‚ then the more juice will be extracted than if cellulase were added because pectinase holds the cell wall together and if it is separated apart from each other‚ then the more juice would be able to flow out. The experimental data show that during the ten
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12 grams pure potassium-free sodium nitrite 12 ml cold water 4 grams cobalt nitrate hexahydrate 4 ml 50% acetic acid ethanol ice glass rod dropper hotplate beakers measuring cylinder weighing boat test tube filter paper funnel filter flask aeration tube scale vacuum pump METHOD 12.01 grams of pure potassium-free sodium nitrite was weighed and added to 12 ml of cold water in a 100 ml beaker. This mixture was then heated on the hotplate until the solid
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