precipitation reaction? Give its one example. Q. 14. What is redox reactions? Give its two examples? Q. 15. Write the balanced chemical equation of the following and identify the type of reaction in each case: i. Potassium bromide(aq) = barium iodide(aq) -> potassium iodide(aq) = bariumbromide(s) ii. Zinc carbonate(s) -> zinc oxide(s) = carbon dioxide(g) iii. Magnesium(s) = hydrochloric acid(aq) -> magnesium chloride(aq) = hydrogen(g) Q. 16. Wrte an activity to shw the change
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experiment is correct? A B C D 3 The dyes must differ in their boiling points. The dyes must differ in their solubilities in the solvent. The line must be drawn in ink. The line must be placed below the level of the solvent. An aqueous solution contains barium iodide. It is possible to obtain a solution that contains Ba2+(aq) but no I–(aq) by adding
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the flame changes color. observations The color of the flame is expected to be as follows: Metallic ion Flame color Sodium Na+ Orange Strontium Sr2+ Dark red Potassium K+ Purple Lead Pb2+ Blue Barium Ba2+ Yellow/green Copper Cu2+ Green Lithium Li+ Pink Calcium Ca2+ Red Unknown Yellow Questions A. All chemical used in this test are binary compounds. What portion of the periodic table is responsible for the color observed
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Abstract Gold‚ silver‚ copper‚ lead‚ and mercury are some of the ancient elements. Hennig Brand discovered phosphorus the first element. After the discovery of phosphorus‚ many more elements were discovered. Johann Dobereiner discovered that elements could be grouped in three sets and proposed the Law of Triads. Later‚ A.E.Beguyer de Chancourtois arranged the elements according to their atomic mass and created the first geometrical representation of the periodic table. John Newlands proposed the
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1. Sodium and potassium are the most frequently ecountered alkali metals‚ though rarely as the metal. Why these elements are rarely found as the metal? (Refer to the relative measurements tabulated in the form of electronegativities‚ ionization energies‚ or reduction potentials). These are due to the fact that their outer most orbital (ns1 valence electron configuration) has tendency to lose electron very easily and make stable configuration. The single valence electron is relatively far from the
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Table of Contents 1. Introduction…………………………………………………………………………3 2. Literature Review 3.1 Definition of Green Logistics………………………………………….4 3.2 Definition of Reverse Logistics……………………………………..5-6 3. Case study – Treeland Services Company Ltd 4.3 Treeland Services Company background…………………………..7 4.4 Working procedure of TreeLand Services Company Ltd………..7-8 4.5 Green Logistics in Treeland company Services Company Ltd…..10 4.6 Electronic waste
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LESSON PLAN School : Senior High School Topic : Solubility product of Constant (Ksp) Grade : XI Semester : 2 Time Allocated : 30 minutes I. Competency Standard Understanding properties‚ measuring method and applying of acid base solutions. II. Basic Competency Predicting precipitation from a reaction based on solubility and solubility product constant principle III. Indicator 1. Explain the meaning of Solubility Product Constant (Ksp) 2. Write
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Write a balanced chemical equation for the complete combustion of ethanol. 2003:22(a) 1 8 25.0 mL of 0.12 mol L−1 standard barium hydroxide solution was titrated with nitric acid. The results are recorded in the table. Titration Volume of nitric acid used (mL) 1 20.4 2 18.1 3 18.2 4 18.1 (a) Write a balanced chemical equation for the reaction of barium hydroxide with nitric acid. 2003:23(a) 1 9 The structures of two commercially significant monomers are shown. (a)
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INTRODUCTION Symptom management is a fundamental aspect of palliative care (WHO 2003). It is the primary therapeutic goal of service delivery and is aimed at subjective wellbeing (De Canno & Martini 2001). Although it is estimated that 90% of patients who access palliative care services have a diagnosis of cancer (Bruera % Portenoy 2001)‚ governments worldwide are now committed to ensuring that palliative care is available to all who need it‚ including patients diagnosed with incurable non-malignant
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A person with bulimia often has an emotional attachment to food and might eat more than 2‚000 calories in one sitting and then induce vomiting. Vomiting‚ however‚ is not the only method of purging. Excessive exercise‚ laxative use‚ enemas‚ fasting or a combination of purging methods are common alternatives to vomiting. People who binge without purging often receive the diagnosis of binge eating disorder. Other symptoms include a feeling of being out of control during the binge-eating
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