Chemistry Lab

Improved Essays
In order to complete this experiment, students had to provide a great amount of focus and a good understanding of the procedures, which were, along with the materials, very detailed. With this being said, because most of the materials had similar names, it was important for students to not manipulate the lab by mixing up the reagents, which would completely ruin the experiment. The important factors that influenced the success of this experiment included the following: 1) 100% transfer, 2) 100% digestion, 3) controlling the amount of bacteria and metals absorbed from the surroundings, 4) excessive boiling of the product, 5) an error with the starch indicator, and 6) 100% reaction. Students also had to understand, like with every other lab completed in this course, that the weighing process created sources of errors as well, such as: not clearing the balance before weighing the samples, not weighing the samples at a …show more content…
For example, when transferring the unknown samples from the weigh boats to the flasks, students could only use the smallest amounts of water possible. With small amounts of water used to transfer the reagent to an equipment, came the possibility of having a less than 100% transfer. And because a 100% reaction is dependent on a 100% transfer, a less than 100% reaction would be observed during this experiment as well. Other factors that can influence a less than 100% reaction included the following: forgetting to add specific reagents when required (i.e, forgetting to add the starch indicator to the product before the titration phase), using the wrong amounts of reagents (i.e. 0.0600g KIO3 instead of 0.6000g KIO3) and not adding the reagents in the specific order given (i.e. adding the starch indicator before adding the ammonium fluoride during the beaker reaction of the unknown samples; ammonium fluoride caused the release of the copper

Related Documents

  • Improved Essays

    Chemistry Lab

    • 675 Words
    • 3 Pages

    I. PURPOSE The purpose of this lab was to observe the physical properties of different samples of matter and to use your observations and knowledge of chemistry to classify each sample as an element, a compound or a mixture. II. MATERIALS 10 beakers containing different samples of matter III. PROCEDURE First off, put on a laboratory apron. Then, take a few minutes at each lab station and record three physical property observations of each sample of matter. Record the three physical property observations…

    • 675 Words
    • 3 Pages
    Improved Essays
  • Decent Essays

    Lab Report Chemistry Lab

    • 239 Words
    • 1 Pages

    This experiment had no questionable errors or results as the experiment was conducted correctly and precisely. To start the experiment, the mass of a clean and dry crucible was measured and simply recorded as 64.484 grams (Figure Aa). The mass of a sample of the solid metal manganese was then also recorded at 1.07 grams (Figure Ag). Next, together they were both recorded together to have a mass of 65.554 grams (Figure Ab). Within a container, 20mL of 3M of hydrochloric acid was introduced to the…

    • 239 Words
    • 1 Pages
    Decent Essays
  • Decent Essays

    Lab Report Chemistry

    • 129 Words
    • 1 Pages

    Questions and Answers: Q. When was the element discovered and who discovered it? Potassium was first discovered by English chemist Sir Humphry Davy in 1807. Q. What was the origin of your elements name? A. Potassium gets its name from the salt potash from which potassium was first extracted. The K symbol for the element comes from the Latin word "kalium", which means potash. Q. What are some properties of potassium? A. Potassium is a soft, silvery-white metal…

    • 129 Words
    • 1 Pages
    Decent Essays