March 2‚ 2011 Lab Report Physical Properties of Two Types of Solids SCH3U0 Maggie Liu Abstract The purpose of this lab is to study some of the physical properties of two types of solids – ionic and molecular. The samples used are sodium chloride (ionic) and camphor (molecular). The physical properties studied are odour‚ hardness‚ melting point‚ solubility in water and solubility in 2-propanol. It is observed that some of the physical properties of sodium chloride are no odours‚ hard‚ a
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the 4 main types of bonds. Put them in order from strongest to weakest. Covalent-electrons are shared between the atoms‚ can be polar or nonpolar depending on the difference in electronegativity Ionic- one atom takes an e- from another‚ form anions and cations Hydrogen- between H and O‚ N or F‚ because electronegativity and unpaired e- Vanderwaals- between all molecules‚ movement of e- causing slight change in polarity 7. List the important features of water. Cohesion‚ hydrogen bonds‚ float as
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SYLLABUS – ADVANCED PLACEMENT CHEMISTRY Required Texts 1. Chemistry: The Central Science by Brown‚ LeMay and Bursten‚ 10th ed.‚ Pearson Education. Inc.‚ Upper Saddle River‚ NJ‚ 2006‚ ISBN: 0131464892 Includes: Text book‚ Laboratory Manual‚ Student Study Guide‚ AP Test Prep Series‚ Solutions to Practice Problems 2. Barrons AP Chemistry‚ Jespersen‚ Neil D‚ 4th ed.‚ Barron’s Educational Series‚ Inc‚ 250 Wireless Boulevard‚ Hauppauge‚ New York 11788
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Chapter 10 - Cumulative Review (94)Identify at least one chemical change and two physical changes that are occurring in the photo. (Chapter 2) (95)Classify each of the following as a physical change or a chemical change. (Chapter 2) a. an aspirin tablet is crushed to a powder b. a red rose turns brown c. grape juice turns to wine d. fingernail polish remover evaporates e. a bean seed sprouts f. a piece of copper is beaten into a thin sheet (96)Which of these statements are true about
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sulphated amino acids. 8. A cell without a cell wall is known as a protoplast 9. The formation of the Secondary Cell Wall is characterised by… The mass synthesis between hemicellulose and cellulose 10. Define the following: a. Electronegativity – the tendency for atoms to attract other atoms to itself b. Adhesion- the forces that hold unlike
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The purpose of this experiment was used to identify the chemical changes a substance undergoes by knowing some of its chemical properties like (Change in color‚ producing bubbles and gas‚ precipitation‚ conductivity). The aim of today’s lab was to help us identify different households and their components‚ they contained whether they were acid/ base‚ because most of the households are based on those solutions like (i.e. Acetic acid = Vinegar = CH3COOH can be used in cooking) or bases solutions
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Chapter 14 Outline * 14.1 The Nature of Acid and Bases * Acid-Base Theories * Arrhenius- Acid is a hydrogen producer and a base is a hydroxide producer * Bronsted-Lowry- Acid is a proton donor and a base a proton acceptor * Lewis- An acid is an electron pair acceptor‚ and I base is an electron pair donor * Conjugate base & acids * Ka= [products]/[reactants] * Acid dissociation constant * 14.2 Acid Strength * In a strong
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affect the activity of the enzyme and the rate of the reaction. The browning of potatoes when they are peeled is caused by catecholase‚ an enzyme‚ as it facilitates a reaction between between catechol and oxygen. In this reaction‚ oxygen’s electronegativity separates 2 hydrogen atoms from catechol‚ oxidizing it and therefore converting catechol to benzoquinone molecules that forms long‚branched chains. The chains are the backbone of the red and brown pigments that cause darkening.
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Alexis Jones 4/20/16 Chemistry- Water Polarity Mrs. Jenny Polarity: The intermolecular forces between the slightly positively- charged end of one molecule to the negative end of another of the same molecule. Polarity simply means that the molecule has both a negatively and positively charged end. The polarity of water is important because it is responsible for dissolving other polar molecules like ionic compounds (such as salt) and sugars. To form ions‚ ionic compounds must be dissolved in water
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200 Things to Know to Pass the Chemistry Exam 1. Protons are positively charged (+) with a mass of 1 amu. Example: Which has the greatest nuclear charge? Cl-35 Ar-40 K-39 Ca-40 2. Neutrons have no charge and a mass of 1 amu. 3. Electrons are small and are negatively charged (-) with a mass of almost 0 amu.. 4. Protons & neutrons are in an atom’s nucleus (nucleons). Which has the greatest number of nucleons? Sn-119 Sb-122 Te-128 I-127 5. Electrons are found in “clouds”
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