within the bonds. Ionic and Covalent Bonds We will be studying two types of chemical bonds in this module: ionic bonds and covalent bonds. Atoms can gain or lose electrons to become charged ions. They form ionic bonds‚ a chemical bond that results from electrostatic attraction between positive and negative ions. This means that in an ionic bond‚ electrons are given up by one atom and gained by another atom‚ and then those atoms are attracted to each other. covalent bond‚ electrons are shared between
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Abstract: When ionic compounds are dissolved in water‚ they break apart into ions. In this lab the opportunity to mix two ionic solutions and observe the results was given. Some ions will remain dissolved and uncombined in the solution even when they are mixed with other ions. When other ions are mixed‚ they form compounds that appear as cloudy or grainy precipitates. The objective of this lab was to observe the formation of compounds and to write the names and formulas of ionic compounds. It is
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Qualitative Test for Some Cations I (The Silver Group) Objective: At the end of the class the student should be able to: 1. Separate‚ detect and identify the ions in a given unknown solution possibly containing the ions of the silver group. 2. Identify the substance responsible for the positive result of each test 3. Point out the suitable conditions necessary for the detection process and the reasons for such conditions Introduction Procedure: 1. 3 test tube labeled 1‚2‚3 was obtained
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Introduction Notes What is Science? Study of/tool to understand/body of knowledge/process to understand the natural world What do Scientists do? Make observations Attempt to discern patters Assume the future is like the past What is Biology? The study of life What is Life? Not ever clearly defined Characteristics of living systems: Highly organized Huge energy users 90% of food we eat is used to keep us going Development Development from a single cell to billons of cells Reproduction
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electronegative one to form a negatively charged anion and a positively charged cation. The two ions are held together in an ionic bond because the oppositely charged ions attract each other as described by Coulomb ’s Law. Ionic compounds‚ when in the solid state‚ can be described as ionic lattices whose shapes are dictated by the need to place oppositely charged ions close to each other and similarly charged ions as far apart as possible. Though there is some structural diversity in ionic compounds‚ covalent
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molecules have uneven charge distribution as one end of the molecule is slightly positive and the other slightly negative‚ this is called polar. Ionic substances such as sodium chloride dissolve easily in water because the positively and negatively charged ions are separated due to the dipole nature of water. As water is dipolar‚ the positively charged atoms of one water molecule attracted the negatively charged molecule of another water molecule. This is called hydrogen bonding. The hydrogen bonding between
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Naming Chemical Compounds PART A Name the following 1 S Sulfur 2 Sb Antimony 3 N2 Dinitrogen 4 PO43- Phosphate 5 Au Gold 6 Rb Rubidium 7 LiCl Lithium Cloride 8 AlBr3 Aluminum (III) Bromide 9 KMnO4 Potassium Manganate (VII) 10 Cu(OH)2 Copper (II) Hydroxide 11 FeSO4 Iron (II) Sulfate 12 NH4Cl Ammonium Chloride 13 ZnCO3 Zinc Carbonate 14 SnF2 Tin (II)Fluoride 15 MgSO4 Magnesium Sulfate 16 MnO2 Manganese (IV) Oxide 17 Ca3(PO4)2 Tricalcium Phosphate 18 NaOH Sodium Hydroxide
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Solutions manual: Chapter 1 Getting started © Pearson Education Australia (a division of Pearson Australia Group Pty Ltd) 2006. This page from the Chemistry Dimensions 1‚ Teacher’s Resource may be reproduced for classroom use. 9 a Copper b Cu2+ ions (the blue colour) are converted to Cu atoms. 10 a Neutralisation b Decomposition c Redox and combination d Redox and combination and combustion 11 a NO2 b NaNO3 c CaCl2 12 Matter can neither be created nor destroyed‚ only changed from
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Write your name here Surname Other names Centre Number Candidate Number Edexcel IGCSE Chemistry Unit: 4CH0 Science (Double Award) 4SC0 Paper: 1C Wednesday 25 May 2011 – Morning Time: 2 hours Paper Reference 4CH0/1C 4SC0/1C You must have: Ruler Candidates may use a calculator. Total Marks Instructions black ink or • Usein the boxesball-point pen. page with your name‚ Fill at the top of this • centre number and candidate number. all • Answer
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Experiment 1: Mixtures Aim: To develop an understanding of different types of mixtures including solutions and examine the different solubilities of some solutes and two solvents: water and ethanol Equipment Bunsen burner Tripod Gauze mat Beakers (2 x 100mL) Boiling chips Distilled water Sodium chloride Sodium chloride (solid) Glass rod Measuring cylinder (25mL) Ethanol Watch glass Thermometer 100% Orange Juice 100% Apple Juice 100% Prune Juice Solder Fruit Scone Charcoal Copper(II) Chloride Magnifying
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