Nitrogen‚ phosphorus‚ and potassium‚ the building blocks for healthy plants‚ are usually not present in sufficient amounts in the soil to support plant growth. These are known as macronutrients. In addition‚ micronutrients‚ such as calcium‚ sulfur‚ and magnesium‚ are also necessary‚ but in smaller amounts.Table 1 shows the role of these nutrients in plant growth. Commercial fertilizers are inorganic or organic compounds that replenish the soil with additional nutrients to increase growth and keep plants
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which was evident during the saponification reaction. The simple soap did appear to be a good emulsifier because the soap did dissolve in the mixture of mineral oil and water. In hard water the calcium and magnesium did loose their effectiveness and became insoluble in the solution. When magnesium was added to acidic water‚ the salt was converted to a fatty acid‚ and was also insoluble. Background: The purpose of this experiment is to demonstrate saponification in order to prepare a simple soap
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Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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ABSTRACT Some rechargeable batteries can be restored through external means‚ such as applying a full discharge. There are‚ however‚ many defects that cannot be corrected. These include high internal resistance‚ elevated self-discharge‚ electrical short‚ dry-out‚ plate corrosion and general chemical breakdown. The performance loss of a battery occurs naturally as part of usage and aging; some is hastened by lack of maintenance‚ harsh field conditions and poor charging practices. This paper examines
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CaF2 29) BP 30) Al2O3 1) magnesium sulfide 2) potassium bromide 3) barium nitride 4) aluminum oxide 5) sodium iodide 6) strontium fluoride 7) lithium sulfide 8) radium chloride 9) calcium oxide 10) aluminum phosphide 11) potassium sulfide 12) lithium bromide 13) strontium phosphide 14) barium chloride 15) sodium bromide 16) magnesium fluoride 17) sodium oxide 18) strontium sulfide 19) boron nitride 20) aluminum nitride 21) cesium oxide 22) rubidium iodide 23) magnesium oxide 24) calcium bromide
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their everyday lives. Minerals The RDA of calcium and phosphorus for children 1 to 10 years is 800mg and that of zinc is 10mg. Children of age 7 to 10 years need 100mg of iron‚ 250mg of magnesium and 120mg of iodine. Pregnant woman and lactating mother should include 400mg calcium and magnesium and 150mg magnesium. Woman in her pregnancy should consume 5mg zinc and 25mg iodine daily while breastfeeding mother should be provided with 10mg zinc and 50mg iodine. Comparing both cases‚ young children
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sustaining metal nutrients from topsoil (Cristol 2002). Leaching magnesium deficiency (Cristol 2002). It causes deterioration of buildings and monuments (Cristol 2002). Turns calcium carbonate to calcium sulfate. The calcium sulfate can crumble and be washed away (Cristol 2002). Particles which can be formed from sulfate and nitrate ions can affect respiration (Cristol 2002). Acid rain may remove soil nutrients such as calcium and magnesium from soils (Cristol 2002). It robs the soil of essential nutrients
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What is molar mass?Molar mass is the weight of one mole (or 6.02 x 1023 molecules) of any chemical compounds. Molar masses of common chemical compounds that you might find in the chemistry laboratory can range between 18 grams/mole for compounds like water to hundreds of grams per mole for more complex chemical compounds.The lightest possible chemical that one can have under normal conditions is hydrogen gas‚ or H2. There is no limit to how heavy a chemical compound can be - it is not uncommon for macromolecules (large
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Oxygen is produced as a by-product. This process is called photosynthesis. Temperature‚ carbon dioxide concentration and light intensity are factors that can limit the rate of photosynthesis. Plants also need mineral ions‚ including nitrate and magnesium‚ for healthy growth. They suffer from poor growth in conditions where mineral ions are deficient. Photosynthesis Photosynthesis is the chemical change which happens in the leaves of green plants. It is the first step towards making food - not just
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evaporate on surfaces such as taps and showerheads. Hard water is water that contains high quantities of calcium and magnesium ions. These hardness minerals‚ in the form of calcium carbonate and magnesium carbonate‚ precipitate out of hard water to form limescale [1]. Therefore‚ to clean or remove limescale‚ something needs to dissolve or soften calcium carbonate and/or magnesium carbonate‚ so it can easily wash
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