Amino acids are a highly important class of molecules‚ which are the monomeric subunits of proteins‚ enzymes‚ and peptides in biological systems. Amino acids contain a carboxylic acid group‚ an amine group‚ and a unique side chain‚ which determines its properties. There are more than 500 amino acids; however‚ only 20 are commonly found1. Due to their importance in biological systems‚ it is important to be able to experimentally analyze and isolate amino acids by separation techniques. One such method
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20cmᶟ pipette ●Hydrated nickel(II) sulphate (NiSO₄.6H₂O) 100cmᶟ standard flask ●Standardised 0.10moll⁻¹ EDTA solution 250cmᶟ conical flask ●1 moll⁻¹ ammonium chloride Weighing bottle ●Murexide indicator Balance (accurate to 0.01g) ●0.88 aqueous ammonia 100cmᶟ beakers ●Deionised water 25cmᶟ measuring cylinder Wash bottle Pipette filler White tile Filter funnel Approximately 2.6g of hydrated nickel(II) sulphate was transferred to a weighing bottle and the contents weighed and about 25cmᶟ of
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iii. Other ingredients used include: rabbit & mice heads‚ lizard liver‚ and ground shells D. Introduction of “ammonia” iv. Romans discovered cleaning properties of “hartshorn” (Moore) 3. Hartshorn: a derivative from antlers and hooves of the red deer. 4. When ground and added into cleaning solution‚ demonstrated many ammonia type characteristics v. This could have led to the most interesting and perhaps widely used ingredient – human urine
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moistened in two different substances (NH4OH and HCl). These cotton balls were plugged at each side of a glass tube. After some time‚ formation of a white ring occurred. The white ring‚ in fact‚ is a product of the reaction between the molecules of ammonia (NH3) and hydrochloric acid (HCl). Results showed that NH3 which has a relatively lower molecular weight (MW NH3= 17.03 g/mol) than HCl (MW HCl= 36.46 g/mol) diffused at a faster rate (dave NH3 = 19.35 cm) compared to HCl (dave HCl= 16.18 cm). Another
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CALCULATIONS CHEMICAL CALCULATIONS INTRODUCTION The first part of this ‘Chemical Calculations’ topic will help us to work out QUANTITIES involved in a reaction; For example‚ a manufacturer might want to know‚ How much ammonia will I produce from 20 tonnes of nitrogen in the Haber Process? To do these calculations you will need to be familiar with the term Ar (relative atomic mass)‚ Mr‚ Molar mass and Mole. Relative Atomic Mass – Ar • The Ar tells us the average
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traits of chemicals and their corresponding chemical reactions with other chemicals were more evident and familiar. Five preliminary tests were used to infer possible ions: two for cations‚ namely‚ precipitation reactions with hydroxide (OH-) and ammonia (NH3) respectively; and two for anions‚ namely‚ precipitation reactions with barium nitrate (Ba(NO3)2)‚ and non-precipitation reactions involving ferric chloride (FeCl3) and potassium permanganate (KMnO4) respectively. Confirmatory tests for all possible
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kJ a. increasing temperature d. removing some Cl2(g) b. increasing the size of the container e. injecting some He gas c. decreasing temperature ____ 4. 10.0 mol of ammonia gas is injected into a 4.0 L container. At equilibrium 1.2 mol of hydrogen gas is found in the container. The number of moles of ammonia gas left in the container must be which of the following? N2(g) + 3H2(g) 2NH3(g) + 94 kJ a. 6.8 d. 8.8 b. 6.4 e. 9.2 c. 8.6 ____ 5. A closed flask contains this
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1ST SIX WEEKS PERIOD Unit A Chapter 1 Lesson 2 Classifying Plants Modeling Water Transport Material: * small sponge‚ * pie tin‚ * water‚ * glass‚ * red food coloring‚ * celery stalk. Procedure 1. Pour a cup of water into the pie tin and the glass. Add food coloring to the glass. 2. Have a student place the sponge in the pie tin and the celery stalk in the glass. 3. After 24 hours‚ ask students how the sponge and celery model water transport systems in
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UTAR FHSC1134 Inorganic Chemistry Trimester 3 Experiment 1 ________________________________________________________________________ Title: Investigating the Properties of Period 3 Oxides Aim: To examine the oxides of Period 3 elements and describe their structure and bonding. Introduction: Generally‚ there are oxides of metals and non-metals. Metals burn in oxygen to form basic oxides while non-metals form acidic oxides. Structurally‚ they are covalent or ionic compounds. You are to
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coordination compound‚ pentaaminechloridocobalt (III) chloride‚ was determined through a synthesis through an oxidation reduction of cobalt (II) chloride hexahydrate (CoCl2·6H2O) and a reaction of the product with ammonium chloride (NH4Cl) and ammonia (NH3). Through iodometric and spectrophotometric analysis‚ the percent cobalt was then found in the samples of pentaaminechloridocobalt. When looking at the iodometric analysis‚ there was a mean amount of 26.29% cobalt with an average deviation of
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