Qualitative Analysis Lab Solubility Data Table Cations | Ag+ | Pb2+ | Cu2+ | Ni2+ | Ba2+ | NaCl | White ppt‚ AgCl(soluble in 12M HCl‚ soluble in sln of good complexing agent‚ 6M NH3) | White ppt‚ PbCl2(soluble in hot water‚ soluble in 12M HCl‚ soluble in sln of xs NaOH) | Soluble – no ppt | Soluble – no ppt | Soluble – no ppt | Na2CO3 | White ppt‚ Ag2CO3(soluble in 6M HCl‚ soluble in sln of good complexing agent) | White ppt‚ PbCO3(soluble in 6M HCl‚ soluble in sln of good complexing agent)
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Qualitative Forecasting Approaches Qualitative forecasting methods are based primarily on human judgement. Quantitative forecasting methods are based primarily on the mathematical modelling of historical data. Here we provide a brief overview of the most important qualitative forecasting approaches. In many environments the time horizon is closely linked to the type of forecasting method used. Longer term and higher level forecasting will often require qualitative forecasting techniques. Such techniques
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SEPARATION OF POWERS IN BOTSWANA Government The constitution implicitly recognises the separation of powers by dealing with each of the three organs of government in separate and distinct provisions. The executive is dealt with in chapter IV‚ sections 30-56‚ the legislature in chapter V‚ sections 57-94 and the judiciary in chapter VI‚ sections 95-106. Executive The whole of chapter IV of the constitution deals with the executive. Part I deals with the President and Vice President‚ part II with
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that will use for the separation depend on differences in physical properties such as decantation‚ filtration‚ extraction and sublimation. The process of separating a liquid from a solid (sediment) by gently pouring the liquid from the solid so as not to disturb the solid is Decantation. Filtration is the process of separating a solid from liquid by means of a porous substance –a filter- which allows the liquid to pass through but not the solid. Extraction is the separation of a substance from a
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Science By DeMarcus Thomas September 11‚ 2012 What is the scientific method? The scientific method is a method for problem solving that has been used for generations. It is the best method for winnowing the truth from lies and delusion (Collins‚ 2012). The scientific method has been used for ages to solve the mysteries of the universe. Though we are not aware of it we use this method more often than we think. Consider this seemingly simple scenario. You arrive home late at night. You walk
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Moreover‚ scientific racism served the purposes of inhuman exploitation‚ and often the justification for the extermination of the Indians in America‚ Africans‚ and many peoples of South Asia‚ Australia and Oceania and settled deep in the consciousness of Western people
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Scientific Method Scientific Method is considered a series of systematic steps and tools that leads to scientific knowledge. These steps allow us to carry out an investigation. Arises as a result of the experience that man has accumulated throughout its history such as the transformation that has been going on in the field of some experimental sciences. It is based on a series of steps and procedures organized for the entire cycle of an investigation. (Makafoosh‚ 1979) Exploratory research: is
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Lab 2: Separation of Mixtures and Solids Purpose: The purpose of this lab is to become familiar with the separations of mixtures and solids. Pre-lab predictions: Data: Data Table 1: Experiment Data | | Grams | Percentage of Mixture | Iron Filings | 2.0g | 26.67% | Sand | 1.6g | 21.33% | Table Salt | 2.4g | 32.00% | Benzoic Acid | 1.2g | 16.00% | Total | 7.5g | 96% | Observations: While the water was boiling with the three solids (salt‚ benzoic acid‚ and sand) the water got
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2012 Melanie Mak Mrs. Perez 11/2/2012 2012 Melanie Mak Mrs. Perez 11/2/2012 The Scientific Renaissance The Scientific Renaissance Today‚ technology has improved with fancy gadgets like computers‚ iPhones‚ iPads‚ tablets‚ and other wireless devices and accessories. Not only has our technology improved‚ yet our knowledge increased greatly about many things. Although‚ we couldn’t have known any of this great information without the help of geniuses from WAY back in the past. From 750 to 1258‚ lay
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Complete the Scientific Method activity on the student website. Write a 350-word paper on the scientific method. Include the following: Summarize the steps of the scientific method * * Observation: a noticeable event that has been witnessed. * * Question: a question attempts to explain the observation ex: why is this happening. * * Hypothesis: a statement made to predict the solution and outcome. * * Prediction: based on the hypothesis‚ indicates the
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