Aim: determine the mass of calcium carbonate in chicken eggshells and hence its percentage by mass Apparatus Uncertainty 25.00 cm3 pipette ± 0.03 cm3 50.00 cm3 burette ± 0.05 cm3 250.0 cm3 volumetric flask ± 0.3 cm3 50.0 cm3 measuring cylinder ± 0.5 cm3 Electronic balance ± 0.01 g Uncertainty of apparatus Measurement Mass of eggshell = 3.15 ± 0.01 g Volume of HCl added = 50.00 ± 0.5 〖cm〗^3 Volume of solution = 250.0 ± 0.3 〖cm〗^3 Volume of NaOH pipetted = 25.00 ± 0.03 〖cm〗^3
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energy will be attainable. Hypothesis: In a reaction between calcium carbonate and hydrochloric acid‚ the products calcium chloride‚ carbon dioxide and water are formed. I predict that the higher temperature of HCl acid‚ the higher the reaction rate will be‚ this is because at a higher temperature there will more fast-moving hydrochloric acid molecules per set volume. This means that there will be a higher chance of the calcium carbonate molecules colliding with the hydrochloric acid and reacting
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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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An investigation in to the rate of reaction Plan: I am going to investigate the rate of reaction. The reaction I will be using is: Calcium Carbonate + Hydrochloric acid ---- Calcium Chloride + water + carbon dioxide. CaCO3 + 2HCl ---- CaCl +H2O + CO2 Measurements and Variables: The variables I have chosen to change is strength of the hydrochloric acid which will be 1 mole‚ 0.7 mole‚ 0.5 mole‚ 0.3 mole and 0.1 mole some variable I will not be using are temperature‚ mass‚ density. The measurements
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Alkynes are colorless and insoluble in water. The lower the members of alkynes (acetylene‚ allylene‚ and crotonylene) are gases. The homology from carbon number 5 to 15 (C5H8 to C15 H28) are liquid and the higher members are solid. Acetylene possesses a pleasant odor when pure. The impure acetylene contains phosphine‚ hydrogen sulphide etc and hence smells bad. Acetylene can be liqiufied at 0°C under 48 Torrs of pressure. The melting point of Acetylene is -81.8°C and boiling point -83.4°C. It is
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The Effectiveness of Chalk Dust as Soil Neutralizer Queeneevi T. Quijano Carolyne B. Coronel Ergie P. Canillas IV-SSC A Mrs. Deborah Agustin Reseach Adviser TABLE OF CONTENTS Title Page Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii Introduction . . . . . . . . . . . . . . . . . . . . . . .
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another pilot scale plate heat exchanger to investigate the possibilities of sweetening seawater from Telok Kalong Beach‚ Terengganu‚ Malaysia. Reverse osmosis (RO) membrane of a surface area of 0.5 m2 was used during the experimental runs. Experiments were conducted at different transmembrane pressures (TMP) ranged from 40 to 55 bars‚ operation temperature ranged from 35 to 45oC‚ feed concentration (TDS) ranged from 34900 to 52500 ppm and cross flow velocities ranged from 1.4 to 2.1 m/s. The
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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. II:ACKNOWLEDGEMENT The researcher
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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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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. II:ACKNOWLEDGEMENT The researcher
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