Apparatus: 5 test tubes‚ 5 conical flasks (100 ml)‚ test tube stand‚ Bunsen burner and stop watch. Materials Required: 5 different samples of soap and distilled water Theory: The foaming capacity of a soap sample depends upon the nature of soap and its concentration. This can be compared for various samples of soaps by taking the same concentration of solution and shaking them.The foam is formed and the time taken for disappearances of foam in all cases is compared. The lesser the time taken by a solution
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The Physical properties of water: 1. Knowledge of the physical properties of water: Water is the most abundant compound on Earth ’s surface‚ covering about 70 percent of the planet. In nature‚ water exists in liquid‚ solid‚ and gaseous states. It is a dynamic equilibrium between solid and gas states at standard temperature and pressure. At room temperature it is tasteless and odourless‚ nearly colourless with a hint of blue. Many substances dissolve in water and is commonly called a universal
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better understanding of the Cost Pools (and the types of cost) and how these costs are allocated to the Cost Objects is a good starting point. 3) I realize that it is very important to identify and define the Cost Objects properly from the start. While I may like to define the Cost Objects narrowly‚ it should only be done to the extent it is economically viable. 4) I recognize that there are a number of ways to allocate indirect costs (from the Cost Pools) to the Cost Objects and these can
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Determination of Vitamin C (Ascorbic acid) concentration in some of Commercial Products‚ by Redox Titration Mouhannad AL.-Hachamii Sadiq J. Baqir Saadon A.Aowda Fatima A. Hussein‚ Dep.of chemistry‚ college of science‚ Babylon University Muhammed K.Alasedi Ministry of Health Hilla city‚ Babylon Abstract The goal of this search is to determine the concentration of vitamin C (Ascorbic acid ) in some of a Commercial Products‚ Vegetables and Fruit Juices by Redox Titration. A redox
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LEE ET AL.: JOURNAL OF AOAC INTERNATIONAL VOL. 88‚ NO. 5‚ 2005 1269 DIETARY SUPPLEMENTS Determination of Total Monomeric Anthocyanin Pigment Content of Fruit Juices‚ Beverages‚ Natural Colorants‚ and Wines by the pH Differential Method: Collaborative Study JUNGMIN LEE U.S. Department of Agriculture‚ Agricultural Research Service‚ Pacific West Area (PWA)‚ Horticultural Crops Research Laboratory Worksite‚ 29603 University of Idaho Ln‚ Parma‚ ID 83660 ROBERT W. DURST and RONALD E. WROLSTAD Oregon
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“The Synthesis of Zinc Chloride”‚ what a peculiar name for a lab that does not even involve synthesis. Synthesis‚ by definition‚ is when two elements are combined in a chemical reaction‚but that is not the case. In this lab we are combining zinc‚ an element‚ and hydrochloric acid‚ a compound‚ but combining a compound and an element is not synthesis‚ it is single replacement. We are taking zinc and hydrochloric acid and making zinc chloride and hydrogen‚ a single replacement‚ but what occurred during
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10/19/2011 Akruti Patel Lab Report #4: Determination of a chemical formula: the empirical formula of Magnesium Oxide 1. Purpose: Determine the empirical formula of magnesium oxide from the percent composition (this can found using the Analytical Method and the Synthesis Method). 2. Introduction: In the late eighteenth century‚ combustion has been studied extensively. In fact‚ according to Steven and Susan Zumdahl‚ Antoine Lavoisier‚ a French Chemist‚ performed thousands of combustion experiments
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plateau‚ the temperature increment was set at 1°C per minute‚ and the melting point range of 147°C -149°C was recorded for the unknown sample. Titration of KHP with NaOH In this part the molarity of diluted NaOH was determined. After mixing 800 mL of water with 4.2 mL of 19.1 M NaOH‚ the diluted solution of NaOH was poured in a buret until the initial volume on the buret was 30.00 mL. 0.3005g of KHP was dissolved in 40.0 mL of 50% ethanol‚ and a drop of indicator was added to the Erlenmeyer flask containing
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Labouring in Water This essay is a reflection of the pool birth I witnessed whilst out on my practical placement. The elements of my experience in this area that I will be reflecting on are the advantages and disadvantages of birthing in the pool and the communication between the midwife and the expectant mother. I have chosen this area to reflect on because I would like to feel confident in promoting pool birthing and I would like to be able to support and provide correct advice for a woman considering
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The first story i’m choosing to refer to is ‘Between the pool and the Gardenias’. In this story it shows how the main character Marie found a baby and took the baby in as her own. We learned that she had multiple miscarriages and also works as a maid. Later on in the story we found out that the baby was actually deceased and that she was just hallucinating thinking the baby was real . I believe that in this story women are portrayed as a source of children and that is all they are really good for
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