Reaction of Iron Filings with an Aqueous Solution of Copper (II) Sulfate Purpose: There were many reasons that we conducted this reaction as a lab. The main objective of the lab was to observe a reaction of Iron and Copper (II) Sulfate. This lab presented a good opportunity to work with numbers using moles and Stoichiometry. This lab was also good for practice using Bunsen burners, glass, and handling hot objects. Lastly, we got to witness and test the Law of Conservation of Mass through the reaction in this experiment.
Experiment 8: Separation of a Mixture of Solids Purpose: The purpose of this lab is to separate the solids mixture containing the iron, sand, benzoic acid and salt. These solids were separated based on the unique properties of different solids such as variation in the magnetic properties and variation is solubility such as ranging from completely insoluble to completely soluble. Procedure: The necessary materials required for this lab procedures was obtained from the labpaq: solids mixture, weighing dish, and digital weighing scale. Each and every solid separated in this lab experiment was weighed using the weighing dish and digital weighing scale. From the solids mixture, the iron filling were separated by using the property of iron fillings that they were attracted towards the magnet.
Allow the test tube to cool and record your observations. 5b. After the test tube has cooled, add 5-10 drops of water and record your observations. 6. Obtain 6 clean/dry test tubes and arrange in your test tube rack.
Nitrogen fixing bacteria in the roots of leguminous plants reduce atmospheric nitrogen to ammonium using ATP and reduced NAD. The ammonium ions released into the soil are oxidised by nitrifying bacteria firstly to nitrite, and then to nitrate. This oxidation increases the nitrogen content in the soil which plants can use to produces many useful molecules including amino acids, proteins, DNA and ATP. The formation of these ions forms part of the ecological nitrogen cycle which plays a key role in sustaining life on this planet. Plants are the producers for an ecosystem.
Equipment: Soil pH Soil moisture content Soil Sampl Beaker Watch glass Soil Sample Universal Indicator Scale Barrium Sulfate Powder Oven pH Chart Method: Soil pH 1.Place soil sample on a watch glass 2.Add a few drops of the Universal Indicator to the soil 3. Dust Barrium Sulfate Powder over the Universal Indicator or so the colour can be seen 4.Match the colour against the pH chart Soil moisture content 1.Weigh an Beaker 2.Add soil sample and reweigh 3.Calculate the mass of the
As aforementioned, the main objective of this lab is to determine whether or not the unknown sample is in fact chromium. In order to do so, the experimenter has a limited list of chemicals to use, which include: * Iron (III) Nitrate, Solid * Chromium (III) Nitrate, Solid * 1.00 M Hydrochloric Acid Solution * 4 M Sodium Hydroxide Solution * Zinc Metal The experimenter also has access to unlimited use of: * Standard lab equipment and glassware * MeasureNet temperature probe * MeasureNet pH probe and drop counter * MeasureNet spectrophotometer and Curvettes In this experiment, the experimenter will utilize various skills learned from previous labs in order to conduct the experiment in a productive and efficient manner. For instance, Chemical reactions will be utilized in order to separate the mixed unknown sample into its various components. One must know that the driving force behind double displacement reactions is the removal of ions, and one must also know that a precipitation reaction is used when two aqueous solutions of ionic compounds are mixed, and a solid is formed. Another example of students using knowledge from a previous experiment is when the experimenter must perform an emission analysis on the remaining aqueous Chromium
Fill the cuvette about 3/4 full of the solution you wish to test. Wipe the outside of the cuvette with a soft tissue (Chemwipe) to remove any moisture or fingerprints from the outside
The cap of a centrifuge tube was used to collect approximately one (1) gram of soil from the sample. This was then added to a bottle containing 99ml of sterile water for a 10-2 dilution, 1ml of 10-2 dilution was then added to a bottle containing 99ml of water for a 10-4 dilution. 1ml from the 10-4 dilution was then added to 99ml of water for a final dilution of 10-6. 1ul of each was plated on different starch agar plates with the aid of a micropipette and a plate spreader. The plates were then incubated for a week.
In this lab we synthesized and analyzed potassium aluminum sulfate (KAl(SO4)12H2O) using a multiple different tests. These test included flame test, melting point, potassium test, sulfate test, and aluminum test. We also determined the number of waters of hydration in Alum. Experimentally and empirically potassium aluminum sulfate is a dodecahydrate (4). The purpose of the laboratory is to determine the number of waters of hydration in aluminum potassium sulfate as well as the purity of the Alum we produce.
After, pour the exact amount of pollutants into the soil in the cup. Finally, let the soil and pollutants stand in the filter for one minute. The results had dirt holding 49.7 ml of gas, 133.6 ml of oil, and 62.4ml of turpentine. Sand held 13.6ml of gas, 94.1ml of oil, and 21.7ml of turpentine. Clay held 93.8ml of gas, 146.2ml of oil, and 104.5ml of turpentine.