and that metals are good electrical and thermal conductors. They are generally malleable‚ fusible and ductile. In a periodic table of elements‚ there are six groups of metals and two of them are the most common. It is the Alkali Metals and the Alkaline Earth Metals. Alkali metals comprise the group 1 elements. They are similarly shiny‚ soft and highly reactive metals. Alkaline earth metals on the other hand‚ comprise the group 2 elements. They are all shiny and silvery-white on appearance and
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Lab report for Experiment #2: Extraction Your Name: Name of TA: Lab Partner’s Name: Lab Section: Title: Experiment #2: Extraction Purpose: What is the purpose of this lab? In your OWN words! Observations: Weighed out 3.2568 grams of chemical mixture that was yellow in color. Dissolved dry chemicals in 38 ml CH2Cl2 with gentle heating. Poured the yellow solution into sep funnel. Added 10 ml CH2Cl2 to flask to rinse‚ poured solution into sep funnel. Added 15 ml 3 M
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you’ll need to remember the following solubility rules‚ so memorize them! Also keep in mind that net ionic equations‚ which are the bare bones of the chemical reaction‚ usually take place in aqueous environments. Here are those solubility rules: Most alkali metal compounds and compounds are soluble. Cl-‚ Br-‚ I- compounds are soluble‚ except when they contain Ag+‚ ‚ or Pb2+. F- compounds are soluble‚ except when they contain group 2A metals. ‚ ‚ ‚ and CH3COO- compounds are soluble. compounds are
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EXPERIMENT 13： Extraction: Extraction with acid and alkali Objective 1. To recover the benzoic acid and p-dichlorobenzene from its mixture from its mixture by using acid-alkali extraction. 2. To determine the percentage recovery and melting point of the recovered benzoic acid and p-dichlorobenzene. Introduction Acid-base extraction is a process which purifying the acids and bases from mixtures based on their chemical properties. Acid-base extraction is performed to isolate the compounds and natural
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Biochemistry Unit The Kinetics of Alkali Phosphatase Inhibition 1. OVERVIEW This practical builds on the enzymology lab skills you learned in the Acid Phosphatase practical. Again‚ you will measure the initial reaction velocity (V 0) of an enzyme reaction‚ but this time in the absence and then presence of an inhibitor. Last time you used Acid Phosphatase (Prac 1)‚ but this time you will use the enzyme Alkali Phosphatase. These enzymes have different primary (and hence tertiary) structures
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1 a) Which element on the table i) is an alkali metal? Li‚ Na‚ K ii) can be cut with a knife? K‚ Na‚ Li b) Arrange the elements Li‚ Na and K in terms i) Hardness starting from the softest. K‚ Na‚ Li ii) Melting point starting from the least K‚ Na‚ Li iii) Density starting from the least. K‚ Na‚ Li iv) Reactivity starting from the least reactive. Li‚ Na‚ K c) A piece of sodium was dropped in a trough containing water
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Lab Report Acids and Alkalis: Chemistry of Neutralization and Salt Formation Introduction: An acid is a group of chemicals. Acids are positively charged ions‚ they are liquid and are solutions of pure compounds in water. If you want to know if something is an acid‚ you can test it by using litmus paper. Acids will turn litmus paper red‚ whilst alkalis will turn it blue. Alkalis are negatively charged ions and are usually solid. Aim: To find out how much of different acids is needed to neutralize
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THE s-BLOCK ELEMENTS 291 UNIT 10 THE s -BLOCK ELEMENTS The first element of alkali and alkaline earth metals differs in many respects from the other members of the group After studying this unit‚ you will be able to • describe the general characteristics of the alkali metals and their compounds; • explain the general characteristics of the alkaline earth metals and their compounds; • describe the manufacture‚ properties and uses of industrially important sodium and calcium
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Identification of Metallic Ions Peter Jeschofnig‚ Ph.D. Version 42-0160-00-01 Kellie Long Purpose: To observe the different flames of alkali and alkaline metals. Procedure: Place a little bit of each element into the well plate. Then you soak a tip of a cotton swab in each solution. Then you place the cotton swab over the Bunsen burner until the flame changes color. observations The color of the flame is expected to be as follows: Metallic ion Flame color
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remaining metals Hypothesis: It was predicted that Magnesium would be most reactive metal in the experiment. Background: As the group number decreases‚ reactivity increases. As the period increases‚ the most reactive is towards the bottom. The alkali metals (Group 1 metals) are identified as the most reactive of all present elements on the periodic table. Seeing as potassium and sodium are both found in group 1‚ this will suggest that potassium will be the most reactive metal. Additionally‚ potassium
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