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4,476 Science Free Papers: 781 - 810

  • Chemical Equilibrium

    Chemical Equilibrium

    CHEMICAL EQUILIBRIUM Reversible reactions and dynamic equilibrium Ammonia (NH3) is an important industrial chemical that is used in the manufacture of fertilisers. It is manufactured by reacting hydrogen with nitrogen. The reaction is said to be reversible and the conversion of reactants to products is never complete. N2 + 3H2

    Essay Length: 1,172 Words / 5 Pages
  • Chemical Reactions

    Chemical Reactions

    Purpose: To understand how single displacement and double displacement theories apply to real life situations. Procedure: See Pg. 244-245. Observations: Experiment Results a)sodium chloride + silver nitrate milky/blue/white later turned gray b)silver nitrate + potassium iodide white/yellow(clear well) blue/green(black well) c)iron(III) chloride + sodium hydroxide Apple Juice Yellow d)sodium

    Essay Length: 279 Words / 2 Pages
  • Chemical Reactions - Sodium Hydroxide

    Chemical Reactions - Sodium Hydroxide

    Chemical Reactions- Sodium Hydroxide A chemical reaction is a change where two or more substances are changed into a new substance. You can identify a chemical reaction by colour change, effervescence (bubbles), when light or heat given off, and the change is usually irreversible. There are 6 main types of

    Essay Length: 1,449 Words / 6 Pages
  • Chemical Reactions of Copper Compounds

    Chemical Reactions of Copper Compounds

    Chemical Reaction of copper compounds Introduction: In this experiment, the objective was to conduct a series of chemical reactions that contain copper or copper compounds. That is to say that the products of each chemical reaction were used in the next reaction. The process starts with a solid copper wire

    Essay Length: 746 Words / 3 Pages
  • Chemical Structures

    Chemical Structures

    ACD/ChemSketch Version 6.0 for Microsoft Windows User's Guide Drawing Chemical Structures and Graphical Images Win!!! See contest details inside. Advanced Chemistry Development Inc. Copyright © 1994-2002 Advanced Chemistry Development Inc. All rights reserved. ACD/Labs is a trademark of Advanced Chemistry Development Inc. Microsoft is a registered trademark and Windows

    Essay Length: 843 Words / 4 Pages
  • Chemical Warfare

    Chemical Warfare

    Luke Corrigan Per. 2 Chemical warfare What is Chemical Warfare: To understand chemical warfare you must first understand what a chemical agent is. A United Nations report from 1969 defines chemical warfare agents as " ... chemical substances, whether gaseous, liquid or solid, which might be employed because of their

    Essay Length: 1,146 Words / 5 Pages
  • Chemical Waste

    Chemical Waste

    Clean Up Of Chemical Waste Chemical spills are major problems that haunt the environment. Strict government regulation are trying help this problem, but governmental leaders face many challenges. Disposal of harmful chemicals is often difficult and costly. Since chemical waste has destroyed the environment, steps are being taken to

    Essay Length: 1,478 Words / 6 Pages
  • Chemicals


    A chemical substance is a material with a definite chemical composition. It is a concept that became firmly established in the late eighteenth century after work by the chemist Joseph Proust on the composition of some pure chemical compounds such as basic copper carbonate.[1] He deduced that: "All samples of

    Essay Length: 1,406 Words / 6 Pages
  • Chemicals Found Everywhere

    Chemicals Found Everywhere

    Hidden Dangers Everyday humans are exposed to toxic chemicals and the majority of these people are unaware of the fact. Until viewing websites with regard to chemicals in our society, I too was unaware of how often an individual comes into contact with these toxins. There were three sites

    Essay Length: 608 Words / 3 Pages
  • Chemistry


    Lab Report Title: The Concept and Measurement of Density Purpose: To gain an understanding of the physical property of density. To gain skill in measurement of mass and volume, in addition to the construction of graphs and the physical interpretation of slope. Procedure: Part 1 Regular solids 1. Use the

    Essay Length: 542 Words / 3 Pages
  • Chemistry


    Question: What is the solubility curve of KNO3 Prediction: Draw a sketch to show the shape of the curve you expect for the solubility of a typical solid dissolving in water at different temperatures. Plot solubility on the y-axis and temperature on the x-axis. Materials: Large test tube Balance Stirring

    Essay Length: 443 Words / 2 Pages
  • Chemistry


    When I was sixteen years old I was going through teen peer pressure of trying to fit in with the people in high school. Well, one hot summer day I decide to relax and color my own hair without my mother's permission. I went to B-Plus hair designs and purchased

    Essay Length: 669 Words / 3 Pages
  • Chemistry


    Plan This investigation is about rates of reaction and what affects them. In this case I am going to look at hydrochloric acid and sodium thiosulphate which is a precipitation reaction. They react as in the equations below: Sodium thiosulphate + hydrochloric acid -> sodium chloride + sulphur +

    Essay Length: 3,158 Words / 13 Pages
  • Chemistry


    Patrick Curtin May 21, 2006 Chemistry Chapter 20 o Hydrocarbons= are composed of only carbon and hydrogen; they are the simplest organic compounds. o Isomers= Compounds that have the same molecular formula but different structures. o Structural formula= indicates the number and types of atoms present in a molecule and

    Essay Length: 1,620 Words / 7 Pages
  • Chemistry


    The original distinction between organic and inorganic chemistry arose as chemists gradually realized that compounds of biological origin were quite different in their general properties from those of mineral origin; organic chemistry was defined as the study of substances produced by living organisms. However, when it was discovered in the

    Essay Length: 1,431 Words / 6 Pages
  • Chemistry


    In this Experiment, we used Hydrochloric Acid and Magnesium to make Hydrogen. The whole purpose was to make it and test it. So once we put the magnesium in the test tube filled with hydrochloric acid, a chemical reaction took place. As the magnesium was dissolving the acid was warming

    Essay Length: 459 Words / 2 Pages
  • Chemistry (history of Salt)

    Chemistry (history of Salt)

    History of- "Evidence" shows sodium chloride was** important as long ago as when supposedly, mastodons were on the earth. Sodium chloride was being used before written history began. 2,700 years B.C there was published in China the Peng-Tzao-Kan-Mu, probably the earliest known pharmaceutical guide. (Sodium) A major part of this

    Essay Length: 1,281 Words / 6 Pages
  • Chemistry and America

    Chemistry and America

    When reading through the May 22, 2006 issue of Chemical & Engineering News, I found that a significant percentage of the articles shared and discussed the latest happenings with companies in the industry. While they may have mentioned a new drug they were developing or a new breakthrough just recently

    Essay Length: 652 Words / 3 Pages
  • Chemistry Basics

    Chemistry Basics

    Summer assignment! Chemistry-study of the composition structure and properties of matter and changes it undergoes Chemical-any substance that has a definite composition Atom - smallest unit of an element that maintains properties of that element Change of state-physical change of a substance from one state to another Chemical change-a change

    Essay Length: 1,472 Words / 6 Pages
  • Chemistry Coursework - the Dissappearing Cross

    Chemistry Coursework - the Dissappearing Cross

    CHEMISTRY COURSEWORK- "THE DISSAPPEARING CROSS" PLANNING Background Information: During a chemical reaction the reacting particles must collide with each other, however, collision alone does not guarantee that the reaction will start. Reaction will only occur if the colliding particles have sufficient combined energy to get over the energy barrier between

    Essay Length: 263 Words / 2 Pages
  • Chemistry in the Development of Synthetic Gemstones

    Chemistry in the Development of Synthetic Gemstones

    Synthetic Gemstones Throughout history, gemstones have been reserved mainly for royalty and families who were very wealthy. People who could not afford them often sought ways to have the things that they desired. The practice of imitating jewels and gemstones has been around almost as long as they have been

    Essay Length: 1,039 Words / 5 Pages
  • Chemistry Independent Study

    Chemistry Independent Study

    Chemistry Independent Study: Gas Laws Gas Laws Since the days of Aristotle, all substances have been classified into one of three physical states. A substance having a fixed volume and shape is a solid. A substance, which has a fixed volume but not a fixed shape, is a liquid; liquids

    Essay Length: 2,517 Words / 11 Pages
  • Chemistry Lab Filtering Technique

    Chemistry Lab Filtering Technique

    Objective: The purpose of the lab is to learn filtering techniques. Specifically, to form and filter a calcium carbonate precipitate using a Buchner funnel. Procedure: a.) Prepared a mixture of .5 M calcium nitrate (45 mL) and .01 M sodium carbonate by combining and stirring the two liquids in a

    Essay Length: 393 Words / 2 Pages
  • Chemistry Lab Measurement and Uncertainty

    Chemistry Lab Measurement and Uncertainty

    I.PURPOSE OF EXPERIMENT The purpose of this lab was to determine the magnitude of the uncertainties produced when making measurements using common lab equipment. II.APPARATUS AND MATERIALS NEEDED safety goggles distilled water (at 20oC) laboratory apron dropper laboratory balance 2 objects of unknown mass standard masses graduated cylinder, 10-mL graduated

    Essay Length: 1,567 Words / 7 Pages
  • Chemistry Metals Report

    Chemistry Metals Report

    Chemistry (Research Task) Gather, process, analyse and present information from secondary source on the rage of alloys produced and the reasons for the production and use of these alloys Metals have been used all throughout history- from stone age to our modern developed society. Metals are naturally obtained from metal

    Essay Length: 1,853 Words / 8 Pages
  • Chemistry of Acids and Bases

    Chemistry of Acids and Bases


    Essay Length: 2,109 Words / 9 Pages
  • Chemistry of Crime Scene Investigation

    Chemistry of Crime Scene Investigation

    Chemistry of Crime Scene Investigation Burn Baby Burn (Arson experiment) Question #1 PURE: 1,2,4,5,9,13,14,18,19,20 MIXTURES: 3,6,7,8,10,11,12,15,16,17, Question #2 DID NOT HAVE THE TWO GASOLINE EXAMPLES IN THE PACKET PRINTED. INFORMATION NOT PRESENT. Question #3 Our group decided that we wanted to find out if foam changed the burning rate and

    Essay Length: 473 Words / 2 Pages
  • Chemistry of the Stratosphere

    Chemistry of the Stratosphere

    here are several techniques used to investigate the chemistry of the stratosphere. The first of these is monitoring which involves analysing the air using spectroscopy. Given that ozone absorbs in the infra-red and ultra-violet regions of the spectrum, the concentration on ozone in a sample can be calculated form the

    Essay Length: 990 Words / 4 Pages
  • Chemistry Open Paper

    Chemistry Open Paper

    Chemistry Coursework In Polymerisation the term 'addition polymerisation' is when there are small unsaturated starting molecules which are called monomers and they join together to form a long saturated polymer that has a double bond this is called a 'free radical' eg: A + A + A + A

    Essay Length: 1,084 Words / 5 Pages
  • Chemistry Planning and Designing Lab

    Chemistry Planning and Designing Lab

    Lab# Date: Topic: The reactivity series Problem: Which of the following metals are more reactive with acids - magnesium, zinc, aluminum, iron, lead, and copper? Hypothesis: Aluminum is the most reactive with acids because it occurs in group III. Aim: To perform a comparative test on which metal is the

    Essay Length: 997 Words / 4 Pages
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