quickly a sugar cube dissolves in water temperature of water/liquid water being shaken water being stirred the sugar lump being loose amount of sugar in the cube In this experiment‚ I will be investigating if the change in water temperature (independent variable) would affect the time it takes for sugar to dissolve (dependent variable). Aim The aim of this experiment is to find out if the water’s temperature would affect the time it takes for sugar to dissolve. To do that‚ we would
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1. Identify the functional group or molecule for each of the following. (3 points) 1. COOH -OH 2. COH -OH 3. COH -OH 1. List whether each of the following substances was positive or negative for reducing sugar‚ as indicated by the Benedict’s test. (6 points) 1. corn syrup (1 point) positive 2. table sugar (1 point) positive 3. unknown 1 (1 point) negative 4. unknown 2 (1 point) negative 5. unknown 3 (1 point) positive 6. unknown 4 (1 point)
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environments‚ but is reactive to oxygen and water. Fresh iron surfaces appear lustrous silvery-grey‚ but oxidize in normal air to give iron oxides‚ also known as rust. Unlike many other metals which form passivating oxide layers‚ iron oxides occupy more volume than iron metal‚ and thus iron oxides flake off and expose fresh surfaces for corrosion. Iron forms compounds mainly in the +2 and +3 oxidation states. Traditionally‚ iron (II) compounds are called ferrous‚ and iron (III) compounds ferric.
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exchange of positive and negative ions between reacting solutions of two ionic compounds. Thus‚ in this example the precipitate must be either silver chloride‚ AgCl or sodium nitrate‚ NaNO3. Sodium nitrate dissolves readily in water and is therefore soluble. Thus we can conclude that silver chloride is the insoluble precipitate. We can represent the formation of this precipitate by a net ionic equation: Ag+ +NO3 ̄ +Na++Cl ̄→AgCl+NO3 ̄+Na+ Net: Ag+ (aq)+Cl ̄ (aq)→AgCl(s) Ions present in the solution but
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Properties of Substances- Gr.12 Chemistry Final Lab Report Lab: Properties of Substances M. Nguyen SCH4U April 27‚ 2012 Abstract The purpose of this experiment was to use a variety of tests to identity the type of bonds which are present in each solid. Various substances (paraffin wax‚ sucrose‚ sodium chloride‚ tin‚ and silicon dioxide) were experimented and identified with tests for hardness‚ solubility‚ conductivity‚ and the time for the solid to melt with a candle and Bunsen burner
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SCH4U 03/04/13 Hydrogen Bonding Purpose: The purpose of this investigation is to test the concept of hydrogen bonding. Hypothesis: Given the concept of hydrogen bonding I predict that the bulky glycerol molecules limits the number of possible hydrogen bonds. If water is mixed with glycerol should make it possible for water to form many hydrogen bonds with the glycerol molecules‚ causing it to become a exothermic reaction. Because glycerol has more possibilities for hydrogen bonding I believe
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Reactivity of Halide Ions Michelle Faktor and Kelly Freas Date of Experiment: October 28‚ 2012 Period 2 Honors Chem Purpose: The purpose of this lab is to observe the reactions of halide ions with different reagents by mixing them together. Analyze data to determine characteristic reactions of each halide ion. Infer the identity of unknown solutions. Materials: * 0.1 M AgNo3 * 0.1 M NaCl * 0.1 M NaF * 0.2 M KBr * 0.2M Kl * 0.2 M Na2S2)3 * 0.5 M Ca(NO3)2
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Testing for Ions Analysis Chemical Changes of Test Solutions Test Solution Silver Nitrate Barium Chloride Potassium Thiocyanate Sodium Sulfate - Stayed white in color - Turned cloudy in color - Precipitation formed in solution - Stayed white in color Potassium Chloride - Turned cloudy in color - Precipitation formed in solution - Stayed white in color - Stayed white in color Iron (III) Nitrate - Stayed orange in color - Stayed orange in color - Changed color from orange
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Chapter 4--The Three-Dimensional Structure of Proteins Student: ___________________________________________________________________________ 1. Exhibit 4A The following question(s) refer to this peptide: Cys-Ala-Gly-Arg-Gln-Met Refer to Exhibit 4A. Total hydrolysis of the peptide in HCl would yield these products: A. Ala‚ Arg‚ Cys‚ Gln‚ Gly‚ Met B. Ala‚ Arg‚ 2 Cys‚ Gln‚ Gly‚ H2S C. Ala‚ Arg‚ Cys‚ Glu‚ Gly‚ Met‚ NH3 D. Ala‚ Arg‚ 2 Cys‚ Glu‚ Gly‚ H2S‚ NH3 E. None of these answers is
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Water Quality and Human Health in Southern Africa: Application to Scenarios to Zimbabwe Tarirai Manyevere A Dissertation Presented in Partial Fulfillment of the Requirements for the Degree MSc in Enviromental Sciences(Pollution and Monitoring) Brunel University(United Kingdom) 2010 ABSTRACT Parsons and Tredoux (1995) in their research noted that water quality requirement for a particular use plays an important role in the management
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