CHEM 3411‚ Fall 2010 Solution Set 5 In this solution set‚ an underline is used to show the last significant digit of numbers. For instance in x = 2.51693 the 2‚5‚1‚ and 6 are all significant. Digits to the right of the underlined digit‚ the 9 & 3 in the example‚ are not significant and would be rounded off at the end of calculations. Carrying these extra digits for intermediate values in calculations reduces rounding errors and ensures we get the same answer regardless of the order of arithmetic
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measure of the affinity or strength of binding between the enzyme and its substrate2. The last part of the experiment was performed to analyze the effect of inhibitor and activator proteins on reaction rate. The input of different effectors such as KCl‚ KNO3‚ NaCl‚ ATP‚ F-1‚6-BP were used
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Introduction The purpose of this lab was to find the theoretical and experimental percentage yields of the double displacement reaction between the solutions Lead (II) Nitrate (PbNO3) and Potassium Iodide (KI). It is important to obtain amounts of Lead (II) Nitrate and Potassium Iodide as close to 1.44g as possible. This reaction creates Lead (II) Iodide and Potassium Nitrate. The precipitate during this reaction is Lead (II) Iodide. The balanced equation is Pb(NO3)2 + 2KI= PbI2 + 2KNO3. In this
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Hot plate Potassium nitrate Distilled water Description of the Object of the Experiment Potassium Nitrate: The chemical compound potassium nitrate is a naturally occurring mineral source of nitrogen. It is a nitrate with chemical formula KNO3. Its common names include saltpetre (from Medieval Latin sal petrae: "stone salt" or possibly "Salt of Petra")‚ American English salt peter‚ Nitrate of potash and nitre. The name salt peter is also applied to sodium nitrate. Description: Potassium
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up to discover the kind of connection between the concentration and absorbance of CuSO4 and have the capacity to utilize this information to measure grouping of unknown concentration in view of a given absorbance rate. To get a straight line calibration curve‚ absorbance versus focuses to be plotted. The
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NaCl(s) Yellow NaCl Red-Orange NaNO3 Dark Orange LiNO3 Red Sr(NO3)2 Dark Red KNO3 Blue-Indigo Ba(NO3)2 Yellow-Green Cu(NO3)2 Green Ca(NO3)2 Red-Orange Ni(NO3)2 Yellow-Green Materials: Nichrome test wire Bunsen Burner 150 mm test tubes (14) 6.0 mol/L HCl Solid NaCl 0.50 mol/L NaCl 0.50 mol/L NaNO3 0.50 mol/L LiNO3 0.50 mol/L Sr(NO3)2 0.50 mol/L KNO3 0.50 mol/L Ba(NO3)2 0.50 mol/L Cu(NO3)2 0.50 mol/L Ca(NO3)2 0.50 mol/L
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5O2(4NO + 6H2O Which of the following statements is correct? A. N is reduced‚ NH3 is oxidizing agent B. O is oxidized‚ O2 is reducing agent C. N is reduced‚ O is oxidized D. N is oxidized‚ O2 is oxidizing agent ____ 3. If 145 g of KNO3 were added to water to make 1‚500 mL of solution‚ what would be the molarity of the resulting solution? A. 0.956 M B. 1.43 M C. 0.0967 M D. 10.3 M ____ 4. Calculate the molarity of the solution formed by diluting 50.0 mL of 0.436 M NH4NO3
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TITLE: Solubility and Thermodynamics PURPOSE: The purpose of the lab was to determine the thermodynamics variables of ∆H‚ ∆S‚ and ∆G for the dissolution reaction of potassium nitrate in water. The solubility of potassium nitrate in mol/L was measured over a range of various temperatures by finding out at what temperature crystallization began for solutions of different molarities. Then‚ the equilibrium constant was calculated and a graphical relationship between the natural logarithm of the
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Water Crystallization and the Chemical Formula of a Hydrate Aim: To determine the percent water of crystallization and the chemical formula of a hydrate Materials * 400 ML beaker * Glass rod * 3 to 5 grams of hydrated copper (II) sulfate CuSO4 (crushed) * Bunsen burner * Spatula * Heating pad * Clamp and stand * Electronic balance Procedures Refer to Lab sheet Observations 1. The powder seems to be very bright and shiny before any heating 2. The blue powder are starting
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placed each solution in that position: NaCH3COO‚ HCl‚ HCN‚ NaOH‚ NH3‚ NaCN‚ KNO3‚ H2SO4‚ NH4Cl‚ H2SO3‚‚ NaHCO3‚ Na3PO4 and CH3COOH. In order of increasing pH: Here are my predictions: ACIDS - H2SO4 – - HCL – - H2SO3 – Weak Acid; - CH3COOH – Weak Acid; - NH4Cl – Weak Acid; - HCN- Weak Acid; NEUTRAL - KNO3 – This is neutral BASES - NaCH3COO – This is a weak base;
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