Chalk and Cheese My children‚ Kaylee and Brendan were born 18 months apart in 2000 and 2002. Looking at them‚ you can tell they are siblings; sometimes they are even mistaken for twins! But once you get to know them‚ you will find they are as different as chalk and cheese. Kaylee and Brendan were raised in the same home by the same parents‚ but they couldn’t be more diverse mentally‚ academically and socially. Kaylee and Brendan are like night and day in how they think. Sometimes I like
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Introduction The major component of eggshells is calcium carbonate (CaCO3). Calcium carbonate cannot be dissolved in water‚ but can dissolve in an acid using the reaction: 2HCl(aq)+CaCO3(s) Ca2+(aq)+CO2(g)+H2O+2HCl-(aq) This reaction is not used to titrate the CaCO3 because it is very slow when the reaction is close to the endpoint. Instead adding an excess of acid to dissolve all of the CaCO3 and then titrating the remaining H3O+ with NaOH solution can achieve the determination of the amount
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one could give through eggshells. This steps was made by the researcher to make a chalk out of eggshells;First she clean the empty eggshell of the chicken through washing‚then when the eggshells is already dry‚ she pound the clean eggshells very well until it will become a powder‚then she get the residue and she separate it from the eggshell that is already in powder then she pour a liitle amount of water into the powdered eggshell and put it on the paper to form a stick chalk and she let it dry.
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SY 2012 – 2013 In Partial Fulfillment of the Requirements In Chemistry “Eggshell as Chalk” i Table of Contents Title Page……………………………………………………………………….…i Table of Contents…………………………..………………………………….…ii Acknowledgement………………………………………………………………..iv Abstract……………………………………………………………………………v Chapter I: Introduction…………………………………………………………………………………….1 Statement of the problem……………………………………………… Hypothesis…………………………………………………………………….. Significance of the study………………………………………………… scope
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Eggshell Lab Lab Set-Up: Materials: * pipette with pipette bulb * conical flask * 1 beaker * 1 molar sodium hydroxide solution * 2 molar hydrochloric acid solution * 1 funnel * 1 piece circular filter paper * crushed poultry eggshell * crushed farm eggshell * phenolphthalein * Distilled water * White tile * Paper tray * burette in burette stand * electronic scale Procedure: Step 1: Standardization of the NaOH solution using
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On A Piece Of Chalk by Thomas Henry Huxley This summary has a great deal of information detailing how chalk shows us about the geological history of earths development. The summary contains excellent facts and scientific investigations. Mr. Huxley originally gave the lecture "On a Piece of Chalk" in 1868 at a meeting of the British Association for the Advancement of Science to the working class of Norwich. His lecture served as a basis for other scientist who would modify or further explain the
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Eggshell Lab Name: _______________________________________________ Date: _____________ Purpose: To determine whether there is a difference in the amount of calcium carbonate in brown versus white chicken eggs. Background: Calcium carbonate (CaCO3) is a component of seashells and eggshells that gives them their strength and hardness. Because calcium carbonate is a base‚ it will react with acids to form a salt and water. The complete reaction of calcium carbonate with hydrochloric acid
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Determining the amount of CaCO3 in eggshell of hen’s egg | Design | DCP | CE | Aspect 1 | | | | Aspect 2 | | | | Aspect 3 | | | | Introduction: The back titration is a method used in determining the amount of excess of the reagent. The calcium carbonate is a substance which gives the eggshell stiffness. Research question: What is the amount of calcium carbonate in the eggshell measured by back titration? Table
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Production of Chalks out of Seashells Introduction Background of the Study More people used to collect seashells for fun and for past time. They made decorations‚ jewelries and even accessories for a doll out of it. But aside from those things‚ seashell can also made into a much useful thing. We are aware that education is the most powerful key for us to succeed. And to support this‚ we need some facilities and materials for us to make it easier and clearer. Of course‚ there is already some
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‘The best teaching aid is a piece of chalk’ Discuss this point of view with reference to the alternatives. What are the best teaching aids? Every Teacher knows there is a place for chalk or white board pens in the classroom‚ every good teacher knows that chalk is not the only effective teaching aid in the classroom. There are three types of teaching in my opinion; regurgitating information word for word from text books and lesson plans‚ teaching using PowerPoints and so projecting‚ and finally
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