The mass of CaCO3 needed was calculated using the ideal gas law and stoichiometry; the amount needed was 0.256 g of CaCO3. Three measurements of 0.256 g were used for three trials. Each trial‚ CaCO3 was placed into a tissue paper‚ and then tied off with a string to prevent the loss of CaCO3. The diameter and the length of the
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Notes Aldehydes and Ketones The major similarity between an aldehyde and a ketone is the carbonyl group. A carbonyl group is a carbon atom doubly bonded to an oxygen atom. [pic] Both molecules have a carbonyl group‚ the difference the number of carbons bonded to the carbonyl carbon. An aldehyde will have none or one and a ketone will have two carbons. All aldehydes‚ except formaldehyde‚ will have a hydrogen atom on one side of the carbonyl carbon and at least on carbon on the other side
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COE CHEMONE Reviewer for CHEMONE Finals Rules for Counting Significant Figures 1. Nonzero integers. Nonzero integers always count as significant figures. 2. Zeros. There are three classes of zeros: a. Leading zeros are zeros that precede all the nonzero digits. These do not count as significant figures. In the number 0.0025‚ the three zeros simply indicate the position of the decimal point. This number has only two significant figures. Note that the number 1.00 _ 102 above is written in exponential
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of solubility and the formation of a precipitate. The Experiment and Observation: Weigh out your 1.0g of CaCl2-2H20 and put it into the 100mL beaker‚ add your 25mL of distilled water and stir to form the calcium chloride solution. Next‚ use stoichiometry to determine how much Na2CO3 and put it into a small paper cup. Then add the 25mL of distilled water to make the sodium carbonate solution. Mix the two solutions in the beaker and a precipitate of calcium carbonate will form instantly. Next‚ set
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The Displacement Reactions Purpose: to see how displacement reaction works with different chemicals and what chemical has more reactivity series then other Hypothesis: Iron + Copper Sulfate: Iron will displace copper because it is more reactive and it is going to end up as Iron Sulphide + Copper Copper + Silver Nitrate: Copper will displace Silver because it is more reactive and it is going to end up as Copper Nitride + Magnesium + Copper oxide: Magnesium will displace Copper because it
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Bibliography: 1) "CHEM 1102." Eggshell Experiment. N.p.‚ n.d. Web. 17 Mar. 2013. 2) "CHEM-212 Eggshell Lab." CHEM-212 Eggshell Lab. N.p.‚ n.d. Web. 17 Mar. 2013. 3) "Stoichiometry." Chem4Kids.com: Reactions:. Andrew Rader Studios‚ 1997-2012. Web. 19 Mar. 2013. 4) "To Determine the Percentage by Mass of Calcium Carbonate in Eggshells" StudyMode.com. 09 2008. 09 2008 .
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Our next goal was to confirm the identity of our compound. We accomplished this goal by creating five reactions containing Sodium Sulfate that would confirm our compound and show its chemical properties. In each reaction‚ we replaced the presence of Sodium Sulfate with our unknown. Our first reaction was the reaction from the sulfate anion test between Sodium Sulfate and Barium Chloride. If the compound was in fact Sodium Sulfate it would produce a white precipitate and it did. The second reaction
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aliquots of sample solution until you obtain concordant results (titres agreeing within 0.1 mL). 37. Record findings 38. Subtract the initial volume to determine the amount of titrant delivered. Use this‚ the concentration of the titrant‚ and the stoichiometry of the titration reaction to calculate the number of moles of reactant in your analyte solution. 39. Then Calculate the results 40. 1. Calculate the average volume of iodate solution used from your concordant titres. 41. 2. Calculate the moles
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Using Buffers Gino A. Romeo‚ Jr.‚ Ph.D. Version 42-0134-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information
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Experiment 7a Name: Date: Title: Purity of Aspirin by Spectrophotometry Aim: i. To measure the absorbance of different volumes of sodium salicylate solutions and aspirin with iron chloride ii. To find the concentration of each standard solutions iii. To determine percentage purity of aspirin. Abstract: The mass of acetylsalicylic acid was determined using a analytical balance. Sodium hydroxide (NaOH) was added to the acetylsalicylic acid and heated in order to hydrolyze acetylsalicylic
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