Survey of the Sciences Unit 4: The Science of Fireworks 7-7-14/7-14-14 What is a firework? An explosive or combustible used for display. In the 19th century the introduction of new ingredients such as magnesium and aluminum greatly heightened the brilliance of such displays. There are two main classes of fireworks‚ force-and-spark and flame. In force and spark compositions‚ potassium nitrate‚ sulfur‚ and finely ground charcoal are used‚ with additional ingredients that produce various types
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for aluminum when the equation is balanced using the lowest‚ whole-numbered coefficients? a) 1 b) 2 c) 3 d) 4 5. Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoricacid. What is the coefficient for sulfuric acid when the equation is balanced usingthe lowest‚ whole-numbered coefficients? a) 1 b) 2 c) 3 d) none of these 6. What is the molar mass of calcium permanganate? a) 159 g/mol b) 199 g/mol c) 216 g/mol d) 278 g/mol 7. What is the molar mass of aspartic acid‚ C4O4H7N
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heating was performed. B. The filtrate from III.A was used for the other tests. a.> Test for lactose. 5 drops of the filtrate was added with 3 ml Benedicts’ reagent. It was heated in a water bath. The results were noted. b.> Test for calcium ions. 1ml of the filtrate was added with 1 ml of (NH4)2C2O4 solution. c.> Test for phosphate. 3 ml of the filtrate was added with a few drops of 6M HNO3
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Kyphosis also known as “hunchback” occurs when the vertebrae in the upper back are wedge shaped instead of cylinder. This disorder can be caused by a number of things such as: Osteoporosis‚ Disk Degeneration‚ slouching/poor posture etc… Kyphosis can happen at any age but it’s most common in older women. In addition to an abnormally curved spine the symptoms can also cause back pain and stiffness in some people. Mild cases of kyphosis may produce no noticeable signs or symptoms. Depending on what
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1. Describe Ossification during Fetal Development. Ossification is the formation of bone and in a fetus is made up of cartilaginous tissue. This tissue is less dense than that of bony tissue. Over time‚ as calcium salts are being deposited into the cartilaginous tissue by immature bone cells‚ the formation of bone occurs. 2. What are the roles of Osteoclasts in bone formation? Osteoclasts reabsorb bony tissue from the innermost part of the bones‚ allowing for a larger cavity‚ in order to avoid
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flame that is produced. Flame tests are a common confirmation test to identify specific elements. Procedure: I began the lab by preparing a safe work area and the required metallic ions. The ions used in this lab were as follows: Barium Nitrate‚ Calcium Nitrate‚ Cupric Nitrate‚ Lithium Nitrate‚ Potassium Nitrate‚ Sodium Nitrate‚ Strontium Nitrate‚ and an unknown solution. I placed 0.5 mL of sodium nitrate into a well on the 24-well plate‚ recording its location. I placed 0.5 mL of the other 7 solutions
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Introduction: The purpose of the first experiment was to practice obtaining accurate and precise results by doing combustion analysis to find the amount of carbon dioxide and water released and the amount of fuel consumed. To identify the amount of carbon dioxide‚ water and burner consumed there were three equations used to find it. Equation 1 shows how much carbon dioxide was released. Mass of carbon dioxide = m2 - m1 Equation 1 was used as an experimental procedure created to help find out
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dissolve in about 500 mL deionized water in a plastic bottle. The bottled is Sealed and shaken vigorously for a few minutes to dissolve the salt. Standardize the Na2EDTA solution using a stock calcium ion solution as the primary standard. Using a 10-mL transfer pipet to add 10.00 mL of standardized calcium ion stock solution (1.000 g CaCO3/L solution) to a 250-mL Erlenmeyer flask which will have an additional 30 ml of deionized water to this titration flask. Adding a magnetic stir-bar the solution
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Purpose To explore transport of materials in three semi-permeable membranes: dialysis tubing‚ eggs‚ and onion cells. Background Information 1. Diffusion is the movement of solutes from high to low concentration. Osmosis is the movement of water from low to high concentration. Both refer to movement in/out of a cell‚ but osmosis refers specifically to water. 2. Isotonic‚ hypertonic‚ and hypotonic all refer to the comparison of concentrations of solutes in verses out of the cell. Isotonic is
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Black T‚ is a dye‚ and will form a pink complex in the presence of a metal cation. As EDTA solution is added to the solution‚ the metal ions will complex to the EDTA solution leaving the indicator solvated. The chemical equation‚ with the known calcium ion solution‚ looks as follows: Where H2In¯ represents the solvated indicator Erichrome Black T dye. H2In¯ + Ca 2+ ⇌ CaIn¯ + 2H (blue) (pink) As EDTA is added to the solution‚ it grabs the Ca ions away
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