First, heat the crucible without its lid, with a strong flame. 6. When the magnesium ribbon starts to burn, cover the crucible with its lid. 7. Using a pair of tongs, carefully raise the lid a little, at intervals.
Explain the function of the following duct components: (57.2) Ell are elbows used to make turns in ductwork, Wye is used to split one large duct into two smaller ducts, Transition is used to change rectangular ducts from one size to another, Boot is used at the end of a round duct to allow connection of a rectangular register or grill. 8. What is the total available static pressure for ductwork for a system with the following specifications? (57.13) 9. Why should air velocity in branch ducts be limited to 600 fpm?
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.
| Iron filings | Black, small, magnetic. | Salt | White, dissolves, edible. | Sand | Brown, minerals, grainy texture. | 2. Materials: In order for us to do this lab we need a few things.
The disadvantage of my flow chart would be that the weight would have been measured but the percentage would not give the accurate scientific measurements. C. How would you explain a sand recovery percentage that is higher than the original sand percentage? I would have to either think that the sand was not dry enough. . D. What were potential sources of error in this experiment?
I suppose I was thinking that it would be estimated by process of elimination. However, I can that this would not be as accurately show, so that true weight and is therefore not scientific. B. Discuss potential advantages or disadvantages of your proposed Procedure compared to the one actually used. C. How would you explain a sand recovery percentage that is higher than the original sand percentage?
Separating out the Iron: First weigh the mass of the dish. Empty “mixture of solids” bag into dish determine the gross mass of the mixture and dish. Compute the net mass: Gross mass – mass of dish=net mass of mixture. Record in data table 1. Spread the mixture into a very thin layer over a full size piece of white paper.
Make a hook on the end of the coil to allow the coil to be suspended from the stirring rod. - Nothing 5.) Hook the coil onto the middle of the stirring rod. Place the stirring rod across the top of the beaker immersing some of the coil in the AgNO3 solution. The copper turned black after a sec.
Benzene has been known to be a carcinogen, while the rest of the chemicals are unknown what long term damage it could cause. Another danger of fracking are spills. Spills occur during the adding of the fluids as well as during the results of the flow back. Drill operators will eventually have spills throughout this process. Hoses can be undone, gaskets can fail, pits leak and liquids always hit the ground, repeatedly in large quantities.
IV. Materials, Methods and Procedures: Materials: * Bunsen Burner * Ring and Ring Stand * Crucible tongs * Crucible and lid * Clay triangle * Scissors * Sandpaper * Magnesium ribbon * Weighing balance Methods and Procedures: 1. Fasten a ring to a ring stand and place a clay triangle in the ring. Place the crucible in the clay triangle and position the cover on the crucible such that a small gap is left open. Heat until the crucibles bottom is red hot.