makes it a stronger acid than ammonia but weaker than alcohols Acidity Acetylene reacts with sodium amide to form sodium acetylide – HC CH + pK a 25 S tronger acid NH2 S tronger base HC C- + Weaker base N H3 pK a 38 Weaker acid It can also be converted to its metal salt by reaction with sodium hydride or lithium diisopropylamide (LDA) + Na H – Sodium hydride [ ( CH3 ) 2 CH] 2 N – Li + Lithium diisopropylamide (LDA) Alkylation of Acetylides
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OXIDATION AND REDUCTION Oxygen makes up only about 20% of the air‚ yet is the essential component for so many reactions. Without it fuels would not burn‚ iron would not rust and we would be unable to obtain energy from our food molecules through respiration. Indeed animal life on the planet did not evolve until a certain concentration of oxygen had built up in the atmosphere over 600 million years ago. The term oxidation has been in use for a long time to describe these and other reactions where
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Situation: Two patients in their 70s present to the office at different times today‚ each with documented heart failure: one diastolic and the other systolic‚ and both are hypertensive. First‚ discuss the difference between systolic and diastolic heart failure‚ providing appropriate pathophysiology. ACEI/ARBs are the only medications prescribed for CHF that have been found to prolong life and improve the quality of that life. EXPLAIN the mechanism of action of ACEI/ARBs and how they affect morbidity
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chemical compounds also known as electrolysis. Therefore leaving us sodium‚ chlorine gas‚ hydrogen gas and oxygen gas. If you are wondering where I got this from here’s how: Salt is NaCl which is Sodium Chloride separate that and you get sodium and chlorine gas. Water is H20 which is Dihydrogen Monoxide (2 part hydrogen and one part oxygen) sepaprate that and you get hydrogen gas and oxygen gas. Anyway‚ hydrogen gas and sodium are both positive ions (atoms)‚ because opposites attract both of
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alloy powders manufacture are known. Currently‚ chemical reduction‚ hydrogenation/dehydrogenation‚ gas atomization‚ plasma-rotating electrode and plasma atomization processes are mainly used for commercial production. a) Chemical reduction Generally‚ the initial source of titanium powder is ` sponge fines ’ ‚ so-called owing to their appearance. Sponge fines are nodular particles of pure titanium produced during the chemical reduction pro-cess from titanium tetrachloride. The commercial manufacture
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in the non-pigmented ciliary epithelium b).more numerous fenestrations in the capillary endothelium c).thinner layer of capillary stroma and d).an increase in all organelles and gap junctions between pigmented and non-pigmented epithelia When Sodium fluroscein is administered systemically and the ciliary body is absorbed with a special gonioprism‚ fluroscein stained aqueous is seen primarily at the tips of the ciliary process. The site of active transport is considered to be the non-pigmented
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and for good health - sodium and chloride ions. They are both elements that the body cannot manufacture itself so it must be supplied by food. Although salt is the most common dietary source for these essential elements‚ sodium also available from various foods that contain sodium naturally. Sodium is a mineral element that plays a critical role in body physiology. It controls the volume of fluid in the body and helps maintain the acid-base level. About 40% of the body’s sodium is contained in bone
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of Water Introduction: Demonstrate the decomposition of water in simple but very colorful and dramatic fashion on an overhead projector. Concepts: • Decomposition reaction • Oxidation–reduction • Electrolysis • pH Materials: Sodium Chloride/universal indicator solution‚ NaCl‚ 25 mL Overhead projector Pencil lead‚ 0.7 mm Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt Graduated cylinder‚ 25- mL Safety Precautions:
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MODEL QUESTION PAPER 2 PUC II Model Question Paper-2 PUC-II CHEMISTRY Time: 3 hr-15 min. Batch-02 Max Marks: 70 Instructions: i) ii) The question paper has four parts‚ A‚ B‚ C and D. All parts are compulsory Part-A Carries 10 marks Part-B Carries 10 marks Part-C Carries 15 marks Part-D Carries 35 marks iii) Write balanced equations and draw diagrams wherever required (Use log tables and the simple commercial calculator if necessary (use of scientific calculator is not allowed) Part-A I. Answer
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The Earth’s atmosphere has changed over billions of years‚ but for the past 200 million years it has been much as it is today. We are‚ however‚ causing our atmosphere to change by human activity. Burning fossil fuels and deforestation are two examples of human effect on the environment. Composition of the Earth’s atmosphere The composition of air You need to know the proportions of the main gases in the atmosphere. The Earth’s atmosphere has remained much the same for the past 200 million years
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