Name: Date: Exp 1: Observations of Chemical Changes Lab Section: Data Tables: Part 1: Chemicals Well No. Observations of the Reaction A. NaHCO3 + HCl A1 clear‚ bubbles B. HCl + BTB B1 yellow‚ clear C. NH3 + BTB C1 clear blue D. HCl + blue dye D1 green E. Blue dye + NaOCl E1 clear blue with the 1 drop of HCl green/blue F. NaOCl + KI A2 rusty-yellow with 1 drop of starch black G. KI + Pb(NO3)2 B2 yellow‚ not clear H. NaOH + phenolphthalein A3 purple‚ violet I. HCl + phenolphthalein
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liquid has a low pH. Therefore a liquid with a low concentration of [H+] would have a high pH. A pH of less than 7 represents an acid‚ while a pH above 7 represents a base. A pH of 7 would be neutral. In this lab‚ we used red cabbage juice as a pH indicator to determine whether common household liquids were acidic‚ basic‚ or neutral. Using
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concentration of a solution. When doing this experiment‚ measurement is very important to obtain the solutions correct concentration. Noting the equivalence point is also another part of this experiment. When neutralizing an acid with a base‚ using an indicator shows rather the colors indicate the reactions of each acid and base pair. A balanced equation and simple calculations will then allow us to determine the concentration of the solution. Procedure: Within this experiment‚ we used two 50mL burets
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Infrared absorption data 8. 2-amino acids (α-amino acids) 8–9 9. Formulas of some fatty acids 10 NMR data NMR data 5–6 7 7 10. Structural formulas of some important biomolecules 10 11. Acid-base indicators 11 12. Acidity constants‚ Ka‚ of some weak acids 11 13. Values of molar enthalpy of combustion of some common fuels at 298 K and 101.3 kPa 11 Beryllium Magnesium 12 Mg 24.3 11 Na 23.0 4 Be 9.0 Lithium
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Syllabus Cambridge O Level Biology Syllabus code 5090 For examination in June and November 2011 Note for Exams Officers: Before making Final Entries‚ please check availability of the codes for the components and options in the E3 booklet (titled “Procedures for the Submission of Entries”) relevant to the exam session. Please note that component and option codes are subject to change. Contents Cambridge O Level Biology Syllabus code 5090 1. Introduction ............................
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amounts of acid and base are present. In this experiment‚ the equivalence point occurs when the moles of acid in the solution equals the moles of base added in the titration. A rapid change in pH with the small addition of acid or base is the indicator for acid-base equivalency. Using a pH meter and a graph of pH plotted versus the volume of base added‚ the equivalence point can be accurately found by finding the point that is in the middle of the vertical part of the curve. Once the equivalence
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Background of the Study Fruits peels of Banana‚ Orange and other fruits are highly rich in potassium‚ ion‚ zinc etc .If these Peel are added in the soil these will become fertilizers. Fertilizers are any organic or inorganic material of natural or synthetic origin that is added to a soil to supply one or more plant nutrients essential to the growth of the plant. Good fertility is fundamental to successful plant growth and the application of fertilizers and manures is an essential graining act
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SECTION ONE RESEARCH PROJECT |AN ANALYSIS OF THE FACTORS AFFECTING THE MOTIVATION OF THE STAFF OF THE CAMEROON COOPERATIVE CREDIT UNION LEAGUE LIMITED | | | INTRODUCTION Wikepedia‚ the free Encyclopedia reports that modern credit union history dates to 1852 when Franz Hermann Schulze-Delitzsch consolidated the learning from two pilot projects
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Observations of the Reaction A. NaHCO3 + HCl A1 Bubbles immediately formed and started popping (not rapidly). This could be seen more easily with the black paper underneath the well plate B. HCl + BTB C1 Once I added the Bromothymol Blue indicator‚ it turned an orange-like color C. NH3 + BTB E1 The reaction turned dark blue. When Bromothymol Blue reacts with an acid‚ it turned orange‚ and when it reacts with a base‚ the end result is blue. D. HCl + blue dye G1 The reaction turned green
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Most highly successful organizations have SMART* goals which include performance measures. The problem with such goals‚ once they are established‚ is they use lagging indicators to track success after the fact. The Four Disciplines of Execution emphasizes an ongoing methodology to focus attention on critical goals‚ leading indicators and associated tasks that drive goal attainment. * Specific - goals written or verbalized that have value or purpose * Measurable – goals are quantified *
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