of all organic matter‚ after which the loss in weight of soil is taken as the organic content. Two methods are commonly used to achieve destruction of organic matter: Oxidation of organic matter with hydrogen peroxide (H2O2). Ignition of soil at high temperature. The H2O2 method may not result in the oxidation of all organic matter‚ thereby underestimating the organic content of the soil. On the other hand‚ the ignition method may also destroy some inorganic constituents‚ thereby overestimating
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If chlorine gas is added to sodium metal to make sodium chloride‚ the sodium has donated an electron and the chlorine has accepted an electron to become a chloride ion or an attached chlorine. If a compound divides into elements in a decomposition‚ a decomposition reaction could be a redox reaction. The electrolysis of water is a redox reaction. With a direct electric current through it‚ water can be separated into oxygen and hydrogen. H2O H2 + O2 The oxygen and hydrogen in the water are attached
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enzymatic method using the GOD-PAP assay (glucose oxidase peroxidase aminophenazone phenol) (schedule coventry‚2013). This assay is based on 2 coupled enzyme reactions and a colorimetric end-point. D-glucose + O2 +H2O → H2O2 + gluconate aminophenazone + phenol + H2O2 → a red dye + H2O2 Under stable conditions‚ absorbance measured using a spectrophotometer will be proportional to the amount of glucose present (schedule Coventry‚2013). Spectrophotometry is a method used to measure absorbance of light
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Cited: Free‚ David. "Re: Can H2O2 be broken down by catalysts other than those in living systems?." MadSciNet: The 24-hour exploding laboratory.. N.p.‚ n.d. Web. 14 Oct. 2012. <http://www.madsci.org/posts/archives/2007-02/1171045656.Ch.r.html>. "HowStuffWorks "Why does hydrogen
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Chapter 11 Relational Database Design Algorithms and Further Dependencies Chapter Outline 0. Designing a Set of Relations 1. Properties of Relational Decompositions 2. Algorithms for Relational Database Schema 3. Multivalued Dependencies and Fourth Normal Form 4. Join Dependencies and Fifth Normal Form 5. Inclusion Dependencies 6. Other Dependencies and Normal Forms DESIGNING A SET OF RELATIONS Goals: Lossless join property (a must) Algorithm 11.1 tests
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ribbon into the test tube 4. Record Observations 5. Clean Workstation - Omit workstation 2 - Workstation 3: 1. Light the Bunsen Burner 2. Record your observations 3. Clean your workstation * WorkStation 4: 1. Add 10 mL of H2O2 to a test tube 2. Add 4-5 drops of MnO2 to a test tube 3. Record Observations 4. Clean your workstation * Workstation 5: 1. Place a small scoop of NaHCO3 in a test tube 2. Add 5 mL of HC2H3O2 to the same test tube 3. Record
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liberate Co(II) in solution. Ammonia and NH4Br were added‚ and the Co(II) oxidized to Co(III) with H2O2 yielding a wine colored solution from which 11.3 g of a solid‚ later identified as [Co(NH3)5Br]Br2‚ was isolated. Chemical Reactions CoCO3 (s) + 2 HBr Co+2 (aq) + CO2 (g) + H2O (l) + 2 Br- (aq) Co+2 (aq) + 5 NH3 (l) + Br- (aq) [Co(NH3)5Br]+ (aq) 2[Co(NH3)5Br]+ (aq) + 2 H+ (aq) + H2O2 (l) 2[Co(NH3)5Br]2+ (aq) + 2 H2O (l) [Co(NH3)5Br]2+ (aq) + 2 Br- (aq) [Co(NH3)5Br]Br2
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Cold water 6. Hot water 7. Room temperature water 8. 1M hydrochloric acid (HCl) 9. 3 M HCl 10. Iron (III) chloride (FeCl3) 11. Sodium chloride (NaCl) 12. Calcium chloride (CaCl2 ) 13. Potassium nitrate (KNO3) 14. 0.3% hydrogen peroxide (H2O2) solution 15. 8 test tubes 16. Test tube rack 17. 3 250mL beakers 18. Alka Seltzer tablet 19. 3 pieces of zinc metal Procedure: Particle size 1. Have two test tubes in the test tube rack. Put 1M hydrochloric acid into both of these test tubes
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more enzymes‚ meaning more space for reactions to occur. In the space given there will be more enzymes reacting with the substrate‚ which in this experiment is hydrogen peroxide (H2O2)‚ until it has reached its optimum‚ where the volume of oxygen produced will not increase due to the fact that there will not be enough H2O2 left for the enzymes Quantitative Hypothesis By doubling the mass of potato‚ the rate of reaction will double also. 2n=2r Scientific Explanation Enzymes are made from
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Mole Conversion Web Quest EO 103 What the heck is a mole? We have Avagadro ( and others) to thank for this…….. 6.02 x 1023 is the number of “things” per mole of the substance. Here is a tutorial for an over view and for a reference as you work through these problems http://www.wiley.com/college/chem/spencer053872/tutorial/gramsmoles/gramsmoles1.html We can use this to do mathematical conversions to determine mass‚ volume‚ and number of atoms or molecules in a given substance. For example let’s
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