2.MATERIALS and METHODS 2.1. Nature of Reactants 2.1.1 We placed 3mL of 3 M HCl into each of 3 seperate test tubes. Next we added mossy zinc to the first test tubes‚ Sn granules to the second and Cu filings to the third and compared the rates of evolution of hydrogen gas in each test tube. 2.1.2. We mixed 3mL of 0.02 M KMnO4 and 2mL of 3 M H2SO4 in a test tube and stirred using a glass rod. Next‚ we divided the solution into two. We added 2mL of 0.03 M Na2C2O4 solution to the first half and
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EQUIPMENT AND REAGENTS 1. EQUIPMENTThirty test tubes One test tube rack Two test tube holders Two spatulas Three 250 mL beakers One stirring rodOne medicine dropper IV. EXPERIMENTAL PROCEDURE 1. REACTIONS OF Cu2 - Prepare 3 test tubes‚ 10 drops of 0.5 M CuSO4 are added into each one-10 drops of the following reagents are added into the tubes 2 M NaOH 2 M NH4OH 0.5 M K4Fe(CN)6. - Record your observations. 2. REACTIONS OF SILVER HALIDES - Prepare 3 test tubes‚ 10 drops of 0.5 M KCl‚ 0.5 M KBr‚ and
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conscious or unconscious. Still‚ most paintings tend to be similar enough to others in theme or composition that they lend themselves well to being compared and contrasted. I will compare and contrast George Tooker’s The Subway‚ and Cyril E. Power’s The Tube Train. George Tooker’s The Subway is a haunting yet beautiful piece. Painted using the egg tempera method‚ it is stunning for its strategic usage of warm colors. The intention of Tooker’s painting is to portray such a familiar scene as a subway as
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the food will undergo a chemical change‚ because the indicator is revealing nutrients found within the substance. Materials: For each group of four students 4 Safety Goggles 4 Pairs of Disposable Gloves (Optional) 20 Test tubes 1 Test Tube Clamp 1 Test Tube Rack 1 Clean EyeDropper 1 Glass Stirring Rod Distilled Water in a beaker 1 Wax Marking Pencil 3 Food samples
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rapidly from the beetroot cells to the solution‚ resulting in the 4ml of 50% alcohol containing the most amounts of pigments. Materials and methods The apparatus needed for the experiment are as follows: o Razor blade/ scalpel o Ruler o 5 test tubes & rack o Labels o Forceps o Distilled water o 25%‚ 50% alcohol o Beetroot (Beta vulgaris) o White tile (for cutting) o 2 petri dish o 3 droppers (water‚ 25%‚ 50% alcohol) o Thermometer o Stop watch o 2 Beakers o Supply of hot water
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concentration of a solution can be determined by considering the relationship of absorbance and concentration. Aims or Objectives To have knowledge‚ experience and be most familiar with the use of spectrophometer To have knowledge and experience of tubes and other relevant laboratory facilities needed. 1 2 To learn to independently prepare‚ conduct‚ and record laboratory practicals or demonstrations of many solutions of known concentration. To accurately measure the absorbance at its correct
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this article‚ we will experiment on the significant in strength of the enzyme by using three different test tubes and measuring the amount of product they give off. To determine this we are going to test the amount of color absorbance by using a special tool to help us understand our results. We will see how our end results show the effect of the amount of concentration we apply to each test tube. The results would be shown by the support of two graphs. Introduction: Enzymes are highly important because
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| |(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 or non-living material in B. | | |Cover the mouth of each tube with a piece of aluminium foil. Press firmly into place round the rim| | |of the tube.
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tubing and bend the glass tube into a U-shape. The glass tube is then filled with a liquid‚ typically mercury‚ so that all trapped air is removed from the sealed end of the tube. The glass tube is then positioned with the curved region at the bottom. The mercury settles to the bottom After the mercury settles to the bottom of the manometer‚ a vacuum is produced in the sealed tube. The open tube is connected to the system whose pressure is being measured. In the sealed tube‚ there is no gas to exert
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FM 2 FLOW ALONG A VENTURI TUBE Summary The objectives of the experiment is to study the validity of the Bernoulli equation and to determine the coefficient of discharge‚ Cd‚ by calibrating the venturi tube as a flow meter. To investigate the validity of the Bernoulli equation‚ the static pressure is taken at each tapping and the total head is determined for the maximum difference setting. The velocity head is calculated using the Bernoulli equation. To calculate Cd‚ the volumetric flow rate
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