Free Added Essays and Papers

Sort By:
Satisfactory Essays
Good Essays
Better Essays
Powerful Essays
Best Essays

Free Added Essays and Papers

Page 3 of 50 - About 500 essays
  • Satisfactory Essays

    can alter the rate of reaction, such as: * Adding a catalyst * Changing in the surface area of a solid * Changes in the temperature * Changes in the concentration I know, from previous experiments, that sulphur is formed when HCL is added to NaSO solution. Between the two reactants, a reaction takes place. This produces sulphur which precipitates out of the solution as a white-ish, and then yellow solid. Developing a plan: When studying the rates of reactions, we will monitor

    • 962 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Measuring Viscosity

    • 961 Words
    • 2 Pages

    Measuring Viscosity Aim - to determine how the mass of Corn flour added to 100ml of water affects the viscosity (gooeyness) of the final mixture. Background - Corn flour, when added to water increases its gooeyness of viscosity. Although this value cannot be actually measured, a person can determine a rough value of its viscosity by recording how long an amount of the mixture takes to flow from one receptacle to another. The longer it takes to flow, the more viscous the mixture. The

    • 961 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    0.10M ethanoic acid was pipetted into a conical flask. 3. 0.10M sodium hydroxide solution was titrated using phenolphthalein as indicator, until the solution was just turned pink. 4. A further 20.0cm3 of the same ethanoic acid solution was added to the flask and was mixed thoroughly. 5. The pH of the resulting solution was determined. Result: ======= Volume of NaOH used is recorded below: Trial (cm3) 1st time (cm3) Initial burette reading 3.55 18.4 Final burette

    • 516 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    rules are worked out for each step. I am going to find the Maxi Product for double numbers, I will find two numbers which added together equal the number selected and when multiplied will equal the highest number possible that can be retrieved from two numbers multiplied together. I am also going to find the Maxi Product for triple numbers, I will find three numbers which added together equal the number selected and when multiplied will equal the highest number possible that can be retrieved from

    • 6048 Words
    • 13 Pages
    Satisfactory Essays
  • Satisfactory Essays

    For two centre tiles Table 1: Pattern: N 1 2 3 4 5 Border Tiles: B 6 10 14 18 22 +4 +4 +4 +4 B= 4N + 2 To get 4N at the start of the formula, you have to put the added outer borders into a table ( see above ). Each pattern number is counted as N and the squares in that outer most border is counted as B. These numbers change as each outer border gets bigger. Every pattern number with only centre tiles has no border

    • 7962 Words
    • 16 Pages
    Satisfactory Essays
  • Satisfactory Essays

    graph is a straight line, which shows that, the extension increase is proportionate to the stretching force up to T (the elastic limit). This is known as Hooke's law. NUMERICAL TREATMENT OF SPRINGS IN SINGLE (1) AND SERIES (2) BEFORE LOAD IS ADDED TYPICAL EXTENSIONS FOR SINGLE (1) AND SERIES (2) SPRINGS Applying Hooke's Law F=K*X F=K*X F=K single X F=KseriesX 1=K single 1 F=Kseries*2 K SINGLE =1n/cm Kseries=1/2=0.5n/cm (1) (2) NATURAL LENGTH OF PARALLEL SPRINGS AFTER

    • 3198 Words
    • 7 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Buffer Solutions

    • 1258 Words
    • 3 Pages

    protecting something. A chemical "buffer" is a mixture of two compounds that protects the pH of a solution from undergoing large changes when small amounts of acid (in the form of hydroxonium ion [H3O+]) or base (in the form of hydroxide ion [OH-]) are added. Buffers usually contain a weak acid and its conjugate base or a weak base and its conjugate acid. One of the two compounds in a buffering system acts as a proton donor, releasing H+ when pH rises, and the other as a proton acceptor, taking up H+

    • 1258 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Gel In this experiment .8% solution was used. By using a 250ml flask the buffer solution was prepared. Using the equation to make enough solution for the entire lab class the equation had to be multiplied by four. The contents of this equation were added to the 250ml flask and swirled to evenly distribute it contents. Then a mark was placed on the outside of the flask to indicate the level of the solution before heating. The flask opening had perafilm placed over it so that there was little to no evaporation

    • 728 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    quantitatively. In acid-base titration experiment, a solution of accurately KHP concentration was added gradually to another solution of NaOH concentration until the chemical reaction between the two solutions were completed. The equivalence point was the point at which the acid was completely reacted with or neutralized by the base. The point was signaled by a changing of color of an indicator that had been added to the acid solution. Indicator was substance that had distinctly different colors in acidic

    • 502 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    weight recorded. The Solid NaOH was then transferred to a 200 cm3 beaker where approximately 150 cm³ of H2O was added to it and the solution stirred with a glass stirrer (a magnetic stirrer was not available as specified in the laboratory manual) until the solid was completely dissolved. The solution was then transferred, via funnel, into a 250 cm³ volumetric flask and H2O added to increase the volume to 250 cm³, the solution was then thoroughly mixed by inversion, ensuring the stopper was

    • 1094 Words
    • 3 Pages
    Satisfactory Essays