Stephanie Thao Chemistry 1151 Laboratory Analysis of acid by titration with sodium hydroxide Ms. Hoang November 2012 Introduction: The purpose of this experiment is to demonstrate an example of how to determine the unknown molarity of hydrochloric acid by titration with a base (sodium hydroxide). Titration is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte (wekipedia). The first step will be measuring
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level 5070/31 CHEMISTRY Paper 3 Practical Test October/November 2010 CONFIDENTIAL INSTRUCTIONS *4711088250* Great care should be taken to ensure that any confidential information given does not reach the candidates either directly or indirectly. The Supervisor’s attention is drawn to the form on page 7 which must be completed and returned with the scripts. If you have any problems
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Gas and Colors! With the variety of chemistry project topics it is often difficult to choose what to do. Let me help you out. You want something that is easy to do‚ is virtually guaranteed to work but that will show the judges away with your incredible chemistry knowledge. This is one of those projects… The project What happens during a chemical reaction? The hypothesis When a chemical reaction happens‚ the original substances change to form different products. The experiments • What a gas
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created by vaporization of liquid which causes expansion of the liquid and therefore making a shock wave. Fireworks are also used in television quite frequently and have a lot of chemistry behind the scenes. This includes the different metals changing the color‚ the gunpowder to fuel the explosion‚ and finally the ingredients such as charcoal and potassium nitrate that are what make the reaction. Another common television art and magic illusion is invisible ink. Invisible ink was first used over
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Topic 6 Microscopic World II Unit 23 Shapes of molecules Unit 24 Bond polarity and intermolecular forces Key C o ncepts Microscopic World II Shapes of molecules • Covalent molecules with non-octet structures • Shapes of molecules • The VSEPR theory • Molecular crystals of buckminsterfullerene (C60) • Carbon nanotubes Bond polarity and intermolecular forces • Electronegativity and bond polarity • Van der Waals’ forces • Factors affecting the strength
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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Chapter 1: Intermolecular Forces: Liquids‚ Solids‚ and Phase Changes Chem 11: General Chemistry 2 Topics 1.1 An Overview of Physical States and Phase Changes 1.2 Quantitative Aspects of Phase Changes 1.3 Types of Intermolecular Forces 1.4 Properties of the Liquid State 1.5 Uniqueness of Water 1.6 The Solid State: Structure‚ Properties and Bonding A hot spring on a snowy day The Kinetic Molecular View of the Three States The characteristic properties of gases‚ liquids
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Appendix APPENDIX 1 Chemical tests for functional groups Homologous series/ Typical compound Functional group(s) Alkanes CH3CH3 ethane C – C and C–H Alkenes CH2 = CH2 ethene C=C Chemical tests/Observations Add liquid bromine in ultraviolet light (or sunlight): White fumes of HBr liberated; decolourisation of bromine occurs slowly (a) Add Br2 in CCl4 at room temperature: Decolourisation of bromine occurs immediately CH2 = CH2 + Br2 → CH2BrCH2Br (b) Add acidified
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holding back children’s imagination‚ sky was the limit; G.I. Joe‚ Barbie‚ E-Z bake oven‚ and the ever so classic Brite-Lite LED art kit. With their imagination‚ a child could become an intergalactic alien slayer‚ or the parent of a tear shedding cabbage patch doll. A technological advancement was created that enslaved and dumb down America’s children. Now it is high definition‚ 1080p‚ brain sucking‚ button smashing video games‚ Children are not using their imagination nowadays. When growing you
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“Be Fed And Be Sheathed” at Bangkok’s Cabbages and Condoms By Debra Feinberg You’ve made it to Bangkok‚ you’ve seen the sites‚ and now you’re dying to sit down for a meal. Despite all the great things you’ve been told about Bangkok’s street food‚ you’ve seen the flies swarming around the food stalls and you can’t stand to watch the barehanded handling of the food‚ especially after the vendor sneezed into his hands and continued serving with out pause! Though intrigued by the cuisine‚ the street
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