D. REACTIONS OF ALDEHYDES AND KETONES WITH SODIUM HYDROXIDE (By: Mary Deo Luigi J. Mabunay 1N-3) Objective: To determine the reactions of Aldehydes and Ketones when combined with Sodium Hydroxide. Process: * Obtain 5 clean and dry test tubes * Put 2mL of 40% NaOH solution to test tubes 1‚ 2 and 3 and on test tubes 4 and 5‚ put 10% NaOH solution * Add 10 drops of the following solution: * Tube 1: formaldehyde * Tube 2: benzaldehyde * Tube 3: acetaldehyde
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Leader’s Book Notes - Boots June 20‚ 2008 By SMA Kenneth Preston Leaders Book Note - Boots Leaders‚ In this edition of my leader book notes I would like to inform leaders of the authorized and unauthorized Commercial-Of-The-Shelf (COTS) and Army issued boots for wear with the ACUs. There has been misunderstanding with the ALARACT Message 140/2007 with leaders in interpreting which COTS boots are authorized and which are not. My intent is to add clarity to the ALARACT message giving
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unknown Na2CO3 was 25.83% Introduction1 The purpose of this experiment was to determine the actual pH at each point during the titration of a sodium carbonate unknown with the use of pH meter. An acid-base titration is a procedure which is used to determine the concentration of an acid or base. A measured volume of
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separating organic compounds by utilizing the concept of acid/base chemistry in so that separation can be done. INTRODUCTION Using acid base chemistry in the separation of substances can be a quite useful technique in organic chemistry. A basic extraction can be carried out by applying a hot solvent such as water to a dry substance like coffee. This will allow for the extraction of caffeine and flavor from the coffee beans. Acid base chemistry can be useful in separating neutral‚ basic‚ and acidic
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levels using a standard wide-range indicator. Based off of the results obtained in the lab room‚ fill in the following table: Solution Number pH from Lab Acid‚ Base or Neutral? Solution Name (what was in the test tube?) Solution 1 6 Neutral Water Solution 2 0 Acid Lemon Juice Solution 3 12 Base Bleach Solution 4 5 Base Coffee 1. How many drops of wide range indicator will you use for each test‚ based on industry standards such as the LaMotte field test? 1 drop Section 2: Now
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during synthesis‚ and can’t go back together after the whole enzyme is completed. Our bases traveled the whole distance just like our neutral solution. Discussion & Conclusion: In this lab we learned that when catalase is mixed with an acid it denatures. The unexpected result was that I thought our base would denature also but instead it did not. My data doesn’t fully support my hypothesis because our base didn’t denature only our acids did. The next time we perform this experiment we should
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check the acidity and record result. Safety precaution: * Acid and base are corrosive‚ irritating to the skin and often release choking vapor. So avoid in contact with your skin‚ eye and skin protection should always be worn when using them. * Transfer by dropper only small amounts at a time. * Have alkali or acid on hand for neutralization in order to minimize the threat caused by accident spill of acid or base. * Neutralization
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finished the substrate will have turned into products and these products detach itself from the enzyme. Denaturation is when proteins lose their tertiary or secondary structure by application of some external stress of compound‚ such as a strong acid or base‚ a concentrated inorganic salt‚ an organic solvent‚ or heat. (http://www.princeton.edu/~achaney/tmve/wiki100k/docs/Denaturation_(biochemistry).html) To denature is to slow down‚ speed up‚ or stop an enzyme from completing its process. Conditions that
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this lab the acid Potassium hydrogen phthalate and two unknown acids were titrated. We determined the molar mass of the Potassium hydrogen phthalate‚ for the unknown acids we calculated the molar mass and the Ka values. We used NaOH as the known base for titrating in all three of the titrations. Our ka value based on our titration curve of KHP was 6.9 (the equivalence point where the pH equals the pKa) and our unknown acids were determined to be Hexanoic Acid (with an actual molar mass of 116
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PRACTICAL 15: DETERMINATION OF HEAT OF NEUTRALIZATION Data collection: |Reaction |Initial Temperature/°C (±0.25) |Final Temperature of Mixture/°C (±0.25) | | |Acid |Base | | |HNO3 + NaOH |28.00 |28.25 |34.50 | |HNO3 + KOH |28.25 |28.25 |34.00
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