C hapter 2 IS MATTER AROUND US PURE How do we judge whether milk‚ ghee‚ butter‚ salt‚ spices‚ mineral water or juice that we buy from the market are pure? physical process of evaporation. However‚ sodium chloride is itself a substance and cannot be separated by physical process into its chemical constituents. Similarly‚ sugar is a substance because it contains only one kind of pure matter and its composition is the same throughout. Soft drink and soil are not single substances. Whatever the source
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← Apply the uses of glass and ceramics. ← Evaluate the uses of composite materials. ← Appreciate various synthetic industrial materiala. (H4SO4) ← USES OF SULPHURIC ACID 1. Sulphuric acid is used to produce chemical fertilizer such as ammonium sulphate and potassium sulphate‚ which are highly soluble in water and can be easily obsorbed by plant. 2. Car batteries contain sulphuric acid which is used as the electrolyte. 3. Sulphuric acid also used in the making of artificial silk-like fibres
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________________________________________________________________________________ ANALYSIS OF FOOD AND NATURAL PRODUCTS LABORATORY EXERCISE Determination of total nitrogen in food and crude protein calculation (Kjeldahl method) ___________________________________________________________ Responsible person: Assoc.Prof. Ing.Kateřina Riddellová‚ Ph.D. CONTENT ______________________________________________________________________________________________________________________ Required
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Worked solutions to student book questions Chapter 4 Analysing acids and bases Q1. Antacid tablets should normally be chewed before they are swallowed. Why? A1. Antacid tablets are normally chewed to provide a larger surface area for faster reaction with stomach acids. Q2. A laboratory test to determine how much hydrochloric acid is neutralised by a brand of antacid does not give a complete picture of its effectiveness in the stomach. What other factors might be important? A2. Other factors to
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I. INTRODUCTION Background of the Study Most of the Filipinos earn a living through agriculture. Throughout the years‚ a lot of fertilizers were improvised‚ mostly for the comfort of the Filipino farmers. Human urine‚ for example‚ is a well-balanced nitrogen-rich quick-reacting liquid fertilizer. It contains nitrogen‚ potassium and phosphorus and other nutrients depending on the diet. The health risks associated with use of human urine in plant production are generally low‚ that is why it’s an
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Study and revision skills INFO This section covers the following ideas and material: An introduction to revision methods‚ including • concept mapping‚ flow charts and mind maps • planned revision timing • practising examination technique. General study methods Organisation of study time The examinations are looming large. Suddenly you realise that you do need your notes and experimental work from the last year or two. Are they in good shape? Well...! It is worth remembering that revision
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LAB REPORT 5 – ACID/BASE CHEMISTRY No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. At least one photograph must show the student’s face. NOTE: This experiment is rather lengthy. Plan accordingly. OBJECTIVES 1. Define strong electrolyte‚ weak electrolyte‚ nonelectrolyte‚ acid‚ base‚ salt‚ strong acid‚ weak acid‚ strong base‚ weak base‚ and neutralization reaction. 2. Compare and contrast the chemical
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Effects of soil ph variation on radish plants growth Background information: the soil ph can have 2 different impacts on the growth of plant roots. First and most important is how it affects the concentration of nutrients present in the soil itself. This variable varies depending on the ph tendency‚ in particular‚ nutrients like phosphorous‚ potassium ‚sulphur‚ calcium and magnesium tend to drastically decrease in more acidic ph conditions (<6.0)‚ on the other hand iron‚ manganese‚ boron
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BIOENERGETICS ENERGY FLOW AND NUTRIENT CYCLING Ecosystem • It is an area which is self contained and life supporting. • It contains biotic (including plant‚ animal and microorganisms) and abiotic or physical factors (including nutrient cycling). • Examples include: coral reefs‚ deserts‚ savannahs and rain forests. • Several habitats and the communities associated with them make up an ecosystem. http://www.bloggersbase.com/images/uplo aded/original/c622477c9e5a5d2040c71563 31f799b10498611d.jpeg
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Identification of Bacterial Pathogens basic skills in diagnostic bacteriology Dr.T.V.Rao MD Dr.T.V.Rao MD 1 Identification of Microorganisms • For many students and professionals the most pressing topic in microbiology is how to identify unknown specimens. • Why is this important? • Labs can grow‚ isolate and identify most routinely encountered bacteria within 48 hrs of sampling. • The methods microbiologist use fall into three categories: ♣Phenotypic- morphology (micro and
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