with a pH of 5.6. Humans or natural occurrences can cause acid rain. For example‚ when a volcano erupts‚ it releases sulfur dioxide as one of the main components‚ which can enter the water and cause it to become acidic. However‚ the primary source of acid rain is the acidic compounds released by atmosphere pollution. Industrial processes like factories and motors like cars release sulfur dioxide (SO2) and nitrogen oxide and dioxide (NO2 or NO3‚ commonly written as NOx)‚ which are both strong acids when
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Research 1. Assess evidence‚ which indicates increases in atmospheric concentration of oxides of sulfur and nitrogen. Thorough collection of data‚ surveys‚ and tests from the 1950’s indicate a rising trend in atmospheric concentrations of oxides of sulfur and nitrogen. An enhancement in funding‚ technological and information resources‚ has led to wider and more detailed analyses of oxides of sulfur and nitrogen concentrations‚ and as the diagrams indicate (see diagrams) there is a clear rise in
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Toggle Sidebar Find Previous NextPage: of 5 Tools Zoom Out Zoom InAutomatic ZoomActual SizeFit PageFull Width50%75%100%125%150%200% Chemical Oxygen Demand (COD)Introduction:The Chemical Oxygen Demand (COD) test is the standard method for measuring the amount of pollution in a sample that is unable to be oxidised biologically.Oxidation takes place on both the organic and inorganic component but as the organic component is more dominant‚ it is
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Experiment 1: The Effects of Coal Mining Coal mining‚ particularly surface mining‚ leads to large areas of land being temporarily disturbed. The mine workings collect and conduct water that is in contact with the widespread pyrite‚ a mineral that produces iron and sulfuric acid when exposed to air and water. In this lab‚ you will see first-hand the reasons why mine drainage can be harmful to the local drainage system if left untreated. Materials: (3) 100 mL Beakers 1 tsp. Crushed pyrite 1 tsp. Activated
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EXPERIMENT 3 DETERMINATION OF ORGANIC MATTER BY WALKEY- BLACK WET OXIDATION METHOD OBJECTIVE: This method determines the percentage of organic carbon and organic matter in the soil. INTRODUCTION The soil sample is suspended in standard potassium dichromate (K2Cr2O7) solution to which concentrated sulphuric acid is then added. The heat generated on adding the sulphuric acid and the presence of chromic acid creates strong oxidizing conditions. The excess chromic
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9.5 Tests for halogens and halide Ions Test for halogen Test method Test observations Test chemistry and comments Chlorine gas Cl2 A pungent green gas. (i) Apply damp blue litmus. (Can use red litmus and just see bleaching effect.) (ii) A drop silver nitrate on the end of a glass rod into the gas. (i) litmus turns red and then is bleached white. (ii) White precipitate. (i) Non-metal‚ is acid in aqueous solution and a powerful oxidising agent (ii) It forms a small amount of chloride ion in water
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CBSE Class IX Term I Summative assessment I Sample paper 3 SECTION A 1. Breathing on a mirror turns mirror foggy‚ what phenomenon is responsible for this? [1] 2. What is the major function of cell wall in plant cell? [1] 3. When a carpet is beaten with a stick‚ dirt comes out of it. Why? [1] 4. (a) Name the two factors on which the buoyant force depends. [2] (b) State the relationship between the buoyant force on an object and weight of the liquid displaced by it. 5. State any two reasons for
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Here is cbse 2007 question paper of science: CBSE X SCIENCE AND TECHNOLOGY (Theory) 2007 (OUTSIDE DELHI) Time allowed: 2 hours 15 mins; Maximum Marks: 100 General Instructions: | 1) | The question paper comprises of two sections A and B. You are to attempt both sections. | 2) | You are advised to attempt all the questions of Section A and Section B separately. | 3) | All questions are compulsory. | 4) | There is no overall choice. However‚ internal choice has been provided in some questions
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Table 8.1- Combustion of magnesium ribbon Observations Reaction was exothermic; magnesium ribbon burned and was glowing a bright white color when ignited. Reactants: Mg and O2 Products: MgO Balanced chemical equation 2Mg + O2 2MgO Table 8.2- Combustion of heptane Observations When holding test tube inverted over heptane flame‚ condensation formed against top walls of the test tube. When the burning splint was added the walls of the test tube became less foggy from the condensation
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Monosodium glutamate (MSG) and salt have a lot in common‚ including a similar appearance. Both consist of white crystals that can differ in size and both may show up in the same types of dishes. Their similarities do not mean that they are exactly the same or that you can use them interchangeably. In this SPICEOgraphy Showdown‚ we will take a look at how MSG and salt compare to each other. How do MSG and salt differ? MSG is one of many different forms of salt used in cooking. Other forms include
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