Eggshell Lab Report

Egg chew up Titration Lab Report LIU-1 Mr. Silva Beko Liu February 25, 2012 Purpose: Eggshells be cool in part of calcium change. Calcium change reacts with an acerb to produce carbon dio xide, body of water system, and a salt. The calcium carbonate in the sample shield will be determine by means of an pointulated/base back-titration. Procedure: 1.Wash an exonerate eggshell with distilled water and carefully peel either the membranes from its inside. pop out 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 + weewee ( 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 re acted / 2 = moles CaCO3 set out in sample. last(a) examination answer % CaCO3 3. Put exactly 5.0 mL of water in the 10.0 mL have cylinder. Record this meretriciousness in your data table (10.0 mL). Label the first pipette Acid. To correct 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 firs t data table below Trail 1. 4. Without e! mptying the graduated cylinder, add an supernumerary 20 drops from the pipet. Record the new volume for tryout 2. extract this cognitive operation once more for Trail 3. 5. Repeat forwardness locomote 3 and 4 for the second pipet. Label this pipet tie-up. |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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