Eggshell Lab Report

Egg jaw Titration Lab Report LIU-1 Mr. Silva Beko Liu February 25, 2012 Purpose: Eggshells be cool in part of calcium change. Calcium carbonate reacts with an acerb to produce carbon dio xide, pissing, and a salt. The calcium carbonate in the sample shield will be indomitable by means of an acidulatedulated/base back-titration. Procedure: 1.Wash an avoid eggshell with distilled piss and carefully peel either the membranes from its inside. part all of the shell in premassed breaker and dry the shell in the drying oven at 110 degree Celsius. for about 15 min. 2. model data and calculations put overs from your teacher, as below. CaCO3 + 2HCl -----CaCl2 + CO2 + piddle ( Volume of acid added (L) ) (1.0mol/L) = moles acid added. Moles acid added - moles base added = moles acid that reacted. Moles of acid that reacted / 2 = mol es CaCO3 set out in sample. closing examination answer % CaCO3 3. Put exactly 5.0 mL of water in the 10.0 mL receive cylinder. Record this meretriciousness in your data table (10.0 mL). Label the first pipette Acid. To calibrate the pipet, fill it with LIU-2 water.

Holding the pipet vertically, add 20 drops of water to the cylinder. Record the new volume of water in the graduated cylinder in the first data tab le infra Trail 1. 4. Without emptying th! e graduated cylinder, add an supernumerary 20 drops from the pipet. Record the new volume for test 2. extract this agency once more for Trail 3. 5. Repeat forwardness move 3 and 4 for the second pipet. Label this pipet invertebrate foot. |Trial |Initial |Final Acid|Initial |Final Base| | |Acid | |Base | | |1 |5.0 ml |5.8 ml |5.0 ml |5.8 ml | |2 |5.8 ml |6.4 ml |5.8 ml |6.8 ml | |3 |6.4 ml |7. 2 ml...If you want to charter a full essay, order it on our website: BestEssayCheap.com

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