St. Joseph School/ Ramallah Chemistry lab Report Students name: Laila Salah Date of exp: 11 /4/2013 Partner’s name: Wattan Date of sub: 25 /4/2013 T.Dima Mogannam kaibni Class: 11thsci.stream -------------------------------------------------------------------------------------------------------------
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exemplifies diffusion. The Brownian movement is random movement of microscopic particles suspended in a fluid‚ caused by bombardment of the particles by molecules of the fluid. First observed in 1827‚ it provided strong evidence in support of the kinetic theory of molecules. The diffusion is a form of Brownian movement‚ or we can say The Brownian movement leads to diffusion in three different types‚ where the particles move from high concentration to low concentration area‚ which are hypotonic‚ hypertonic
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Two main classifications of single-replacement reactions are cation replacement reactions and anion replacement reactions. Cations are positively charged ions‚ which consists of all metals‚ while anions are negatively charged. Amrita University explains that in a cation replacement reaction‚ “One cation replaces another” and in an anion replacement reaction‚ “one anion replaces another from its solution
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Vitamin c Estimation by back(idiometric) titration Mahindra (UWC of India) Chemistry lab report for back titration Name: Ashenafi Asfaw Beyene Back (Indirect) Titration Vitamin C estimation by Back Titration Table1: The amount of volume (in cm3) and concentration (in M) of KI‚ KIO3‚ and H2SO4 which were used in the experiment of Vit C estimation
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silver and copper‚ solutions containing aqueous; Zn2+‚ Pb2+‚ Cu2+ and Ag+ ions (0.2 M)‚ hydrochloric acid (5.0 M)‚ emery paper‚ test-tubes. Method: Burnish the three metal strips to get a shiny surface‚ after drop a drop of each of the metal ion solutions on the cleaned metal strips. Wash it off after a few minutes‚ and if there is patina present‚ record it. To test the reaction between the solids and hydrogen (H+) ions a small piece of each metal was dropped into a test-tube with 0.5 M hydrochloric
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CONTENTS Class XI Unit 5 : States of Matter 5.7.1 Kinetic Energy and Molecular Speeds 5.7.2 Maxwell-Boltzmann distribution of molecular speeds Unit 6 : Thermodynamics 6.6.1. Second Law of Thermodynamics 6.8. Third Law of Thermodynamics Unit 7 : Equilibrium 7.12.1 pH of Buffer Solutions Class XII Unit 16 : Chemistry in Everyday Life 16.4.2.1 Antioxidants 3 Unit 5: States of Matter 5.7.1 KINETIC ENERGY AND MOLECULAR SPEEDS As you have studied in
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inside of them. Bottom row: A plasma globe‚ illustrating some of the more complex phenomena of a plasma‚ including filamentation. The colors are a result of relaxation of electrons in excited states to lower energy states after they have recombined with ions. These processes emit light in a spectrum characteristic of the gas being excited. The second image is of a plasma trail from Space Shuttle Atlantis during re-entry into the atmosphere‚ as seen from the International Space Station. Continuum mechanics
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10.0 EXPERIMENT ON DETERMINATION OF DISSOLVED OXYGEN Sl. No. Contents Preamble 10.1 Aim 10.2 Introduction 10.2.1 Environmental Significance 10.3 Principle 10.4 Materials Required 10.4.1 Apparatus Required 10.4.2 Chemicals Required 10.5 Sample Handling and Preservation 10.5.1 10.6 Precautions Procedure 10.6.1 Preparation of Reagents 10.6.2 Testing of Water Sample 10.7 Calculation 10.7.1 Table 10.7.2 Data Sheet 10.8 Interpretation of Results 10.9 Inference 10.10 Evaluation
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Purpose: • To study some of the physical properties of two types of solids – ionic and molecular solids. • To classify three unknown substances as ionic compounds‚ polar covalent compounds or non-polar covalent compounds. • To identify the three unknowns. Observations: A B C Solubility in: • H2O • 2-Propanol Soluble Insoluble Soluble Insoluble Insoluble Soluble Conductivity None High None Melting Point 100 – 525 ℃ > 525 ℃ < 100 ℃ Odour Subtle None Very Strong Concluding
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Periodic Table Trends: Atomic Radius - half of the distance between the centers of two atoms that are touching each other decreases moving left to right increases moving top to bottom Ionization Energy - energy required to remove an electron increases moving left to right decreases moving top to bottom Electron Affinity - ability to accept an electron alkaline earth elements have low electron affinities halogens have high electron affinities noble gases have electron affinities near zero
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