"Chlorine" Essays and Research Papers

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  • The Element: Chlorine

    Element: Chlorine General Information We researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.453. It has a valence number of 3. The element has 3 energy levels. Chlorine exists as a greenish-yellow gas at normal temperatures and pressures. Chlorine is second in reactivity only to fluorine among the halogen elements. Chlorine is a nonmetal. It is estimated that 0.045% of the earth’s crust and 1.9% of sea water are chlorine. Chlorine

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  • Chlorine Lab

    Determination of the concentration of chlorine ions Aim: To compare the concentration of chloride ions in pool and tap water respectively. Background: Tap water contains a variety of dissolved ions such as Ca2+‚ Mg2+‚ Na+‚ HCO3- and Cl-. In this experiment we will determine the concentration of the Cl- ions‚ and comparing it to the concentration found in a sample of pool water. The method used is the standard one for determining the concentration of chloride ions: titration with

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  • Chlorine and Mark

    precipitate with alcoholic silver nitrate (Q.2) Dry ether The reaction RX + 2Na + RX _______________? R-R + 2NaXis called. ( 1 mark ) (a) Sandmeyer’ reaction (b) Fittig reaction (c) Wurtz reaction (d) Williamson’s synthesis (Q.3) Substitution of chlorine takes place readily at higher temperature in : ( 1 mark ) (a) CH3CH=CH2 (b) H2C=CH2 (c) HC C (d) None of the above (Q.4) (CH3)3CMgBr on reaction with D2O gives: ( 1 mark ) (a) (CH3)3CD (b) (CH3)3COD (c) (CD3)3CD (d) (CD3)3OD (Q.5) The silver

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  • Chlorine and Mole Ratios

    ractice Problem #1: Oxygen gas can be produced by decomposing potassium chlorate using the reaction below. If 138.6 g of KClO3 is heated and decomposes completely‚ what mass of oxygen gas is produced? KClO3 (s) --> KCl (s) + O2 (g) [unbalanced] Answer to Practice Problem #1: 1. Balance your equation first. 2KClO3 (s) --> 2KCl (s) + 3O2 (g) [balanced] 2. Convert from grams to moles using molar mass.

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  • Chlorine Research Paper

    CHLORINE Chlorine is an element I would like to present today. It is discovered in 1774 by Carl Wilhelm Scheele and was named by Sir Humphry Davy in 1810‚ after a Greek word‚ khlôros‚ which means greenish yellow. Chlorine is in the halogen group in the periodic table with an atomic number of seventeen. Pure chlorine is yellowish-green but most common compounds with chlorine are typically colourless. The element itself was first produced in 1774 by Carl Wilhelm Scheele‚ by heating hydrochloric acid

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  • Chlorine and Cu Zn

    26.5g sample of impure paracetamol contains 24.5g of pure paracetamol. Calculate the % purity of this paracetamol. %purity = pure/impure x 100 = 24.5/26.5 x 100 = 92.5% 4. When 11.50g of sodium reacts with excess chlorine‚ 22.3g of sodium chloride is made. 2Na + Cl2 2NaCl Ar : Na = 23‚ Cl = 35.5 Calculate: a.

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  • Chlorine and Potassium Hydroxide Solution

    (CuSO4.5H2O) are contained in 5.00g of the substance? (6) 11. Calculate the percentage composition by mass of nitrogen in ammonium nitrate‚ NH4NO3. (5) 12. What is the volume occupied by 0.25 mol of chlorine gas? (7) 13. What volume of hydrogen chloride gas is produced by the reaction of 40cm3 of chlorine with hydrogen? (First write a balanced equation). (10) 14. A sample of ammonia weighs 2.00g.What mass of sulphur dioxide contains the same number of molecules as are in 2.00g ammonia? (8)

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  • Chlorine and Magnesium Lab Introduction

    iLab‚ Week # 3 ATOMIC WEIGHT OF MAGNESIUM LAB Introduction The purpose of this lab experiment is to determine the atomic weight of magnesium by measuring the amount of hydrogen gas evolved when hydrochloric acid reacts with magnesium. The reaction is as followed: Mg + 2HCL  H2 + Mg2+(aq) + 2Cl-(aq) In this experiment there is a one to one relationship between the number of moles of hydrogen gas evolved and the moles of magnesium metal consumed in the reaction. Therefore in the finding of

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  • Magnesium: Chlorine and Hydrogen Moles

    ATOMIC WEIGHT OF MAGNESIUM LAB Introduction The main purpose for this experimental lab is to determine the atomic weight of magnesium‚ as well as an underlying purpose in determining the relationship between moles evolved and consumed. This can be demonstrated by measuring the hydrogen gas evolved by performing a chemical experiment when hydrochloric acid reacts with the magnesium. The formulated reaction includes; Mg + 2HCl → H2 + Mg2+(aq) + 2Cl- (aq) The major findings contributing

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  • Chlorine and Starch Ts Assay

    QUALITY CONTROL LABORATORY Mam Dawn Assay of HCL Aqueous Alkalimetry Direct titration 0.1N NaOH Methyl Red TS HCL + NaOH NaCl + H2O Assay of Diluted H3PO4 Aqueous Alkalimetry Direct titration 0.1N NaOH Thymolphthalein TS H3PO4 + 2NaOH Na2HPO4 + 2H2O Assay of H3BO3 Aqueous Alkalimetry Direct titration 0.1N NaOH Phenolphthalein TS H3BO3 H+ + BO2- + H2O

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