Essays

Modified winkler method

Abstract In this experiment, the Winkler Method was used to measure the dissolved oxygen (d. o. ) in a water sample from the pond in the Arch of the Centuries which had the owl statues. Then, the amount of oxygen …

    Boiling tube

    |Experiment 2. The gas produced in respiration | | | |[pic] | |(a) Label two boiling tubes A and B and place a known weight or number of living organisms in A. | | |Place an equal quantity of dead …

      Water – electrochemistry

      Form 6 Chemistry Practical Experiment 1Mole Concept in Gas and Electrolysis This experiment consists of two parts: A) To determine the relative molecular mass of a volatile liquid B) To determine the Faraday Constant (A)To determine the relative molecular mass …

        Disposing needles

        How to dispose of the needles in WV? 1. You should place: • Needles • Syringes • Lancets, and • Other sharp objects … in a hard-plastic or metal container tightly secured lid A co’ee can will do if the …

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          Emergency сart

          This is also known as crash carts are found in all hospitals and emergency rooms and contain supplies and equipment necessary to treat life-threatening situations. Emergency Cart is a wheeled cabinet or chest of drawers that contains all of the …

            Orange and Vitamin C solution

            Determination of the concentration of vitamin C in fruits/vegetables by using the DCPIP test (2008) Principle : Vitamin C is a strong reducing agent. It can decolorize the blue dye DCPIP. The amount of vitamin C in a food sample …

              The fefect of temperature on the solubility

              Beijing World Youth Academy Subject: Chemistry Student name: YeiYoung Choo Candidate number: 000791 011 January 21, 2009 Teacher Helen Xu The Effect of Temperature on the Solubility of Carbon Dioxide in Water under Constant Pressure (Evaluated for Design) Research Question …

                Model chemLab

                Introduction The purpose of this experiment is to test Charles’ law by finding the relationship between the volume of a gas and its temperature. Charles’ law states: “at constant pressure, the volume of a particular sample of gas is directly …

                  The floating leaf disk assay for Investigating photosynthesis

                  Introduction: Trying to find a good, quantitative procedure that students can use for exploring photosynthesis is a challenge. The standard procedures such as counting oxygen bubbles generated by an elodea stem tend to not be “student” proof or reliable. This …

                    Ascorbic acid

                    |Construct |Sample Answers | |1. Objective |To determine the concentration of vitamin C in the samples of fruits. | |2. Problem |Able to relate P1, P2 and H in a question form. | |Statement | | | |Sample answer: | …

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