100⁰C | 9:36 am | 9:36 am | 0 minute | Figure 3: Enzyme Activity (Time for Starch Hydrolysis) vs. Temperature D. Inhibition of Enzyme Activity Compound | D-1Starting Time | D-2Time for Blue Color to Fade | D-3Time for Starch Hydrolysis | AgNO3 | 9: 10 am | 9:48 am | 38 minutes | NaCl |
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Title Membrane Permeability Aim To determine the effect of various chemicals and high temperature on the membrane permeability of beetroot Hypothesis Organic solvent and high temperature will destroy the cell membrane and make it permeable to the red pigment. The higher the concentration of the alcohol‚ the greater will be this effect. Principle Beetroot is the material used in this experiment to demonstrate the effects of high temperature and chemicals on the permeability of the cell membranes
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Notes Aldehydes and Ketones The major similarity between an aldehyde and a ketone is the carbonyl group. A carbonyl group is a carbon atom doubly bonded to an oxygen atom. [pic] Both molecules have a carbonyl group‚ the difference the number of carbons bonded to the carbonyl carbon. An aldehyde will have none or one and a ketone will have two carbons. All aldehydes‚ except formaldehyde‚ will have a hydrogen atom on one side of the carbonyl carbon and at least on carbon on the other side
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Equipment: Balance Labeling 50 ml beaker 100 ml beaker 125 ml Erlenmeyer Flask Spatula Stirring rod Wash bottle and distilled or deionized water Wooden splint III. Reagents: Acetone‚ CH3COCH3 Copper Wire‚ Cu Nitric Acid‚ HNO3 Silver NItrate‚ AgNO3 IV. Procedure: 1. Obtain a clean and dry 50-mL beaker. Zero the balance with the beaker on the balance pan and then carefully add 1.4–1.6 g of silver nitrate to the beaker. Caution: Use a spatula to transfer the solid—do not touch the silver nitrate
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CHM1022 Tutorial 2 – Semester 2‚ 2012 (Chemical Equilibria) 1. The reaction 2 HCl(g) +I2(s) [pic] 2 HI (g) + Cl2(g) has Kc = 1.0 x 10-34 at 25˚C. If a 1.00 L reaction vessel initially contains 0.100 mol of each HCl and solid I2‚ what are the concentrations of HI and Cl2 at equilibrium? 2. Consider the following gas-phase reaction and equilibrium constant at 25 oC: 4 HCl(g) + O2(g) [pic] 2 Cl2(g) + 2 H2O(g) The concentrations of all species were measured at a particular
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Title: Observation of Macroscopic Chemical Changes‚ Alice Kimbrell‚ Chemistry 101-DS01:74589‚ 5/31/2013. Purpose: In this lab‚ I will observe macroscopic changes that occur when mixing together certain chemicals and household cleaners. The mixing of the chemicals provided with each other and with acid/base indicators demonstrates how matter can change‚ and how chemistry can be seen with the naked eye. By mixing household cleaners with an acid/base indicator I hope to demonstrate how these
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glittery |the sliver of magnesium. | | | | |(+) the liquid looks |(+) There was also a black |(+) The copper almost looks |(+) the balls of lead turned| |AgNO3 |ash-like and the Zinc turned|spot that appeared on the |like fuzz grew on it |black and look fuzzy and | | |black and looks like it is |magnesium. |
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the basis for balancing chemical equations is A) the Law of Conservation of Energy. B) the Law of Conservation of Mass. C) the Law of Conservation of Mass and Energy. D) the Law of Definite Proportions. E) Avogadro’s Law. 11. The reaction 2 AgNO3
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Objective To compare the relative reactivities of different alkyl halides with two different reagents; sodium iodide in acetone and silver nitrate in ethanol. Below the reaction equations 1. RX+NAIRI+NAX (X=Cl or Br) in the presence of acetone 2. RX+AgNO3+EtOHROEt+AgX+HNO3 We used three substrates primary secondary and tertiary compounds are 1-bromobutane‚ 2-bromobutane and 2-bromo-2-methylpropane respectively to react with the two nucleophiles that are sodium iodide with acetone solvent and silver
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Sodium chloride into tube 7‚ and five drops of Potassium chloride into tube 8. Last‚ drop a strip of magnesium metal into tubes 6‚ 7‚ and 8. VI. Data: Zinc Copper Magnesium Lead nitrate / Pb(NO3)2 (results) (results) _ Silver nitrate / AgNO3 _ (results) _ Copper sulfate / CuSO4 (results) _ _ Magnesium chloride / MgCl2 (results) _ _ Zinc chloride / ZnCl2 _ _ (results) Sodium chloride / NaCl _ _ (results) Potassium chloride / KCl _ _ (results) VII. Discussion: VIII. VIII. Conclusion:
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