Title: Preparation and isolation of an Ester Aim: To make an ester and purify it Background Theory: Esters are derived from carboxylic acids and alcohols with the presence of a catalyst. A carboxylic acid contains the -COOH group‚ and in an ester the hydrogen in this group is replaced by a hydrocarbon group of some kind. Sulfuric acid (H2SO4)is used as a catalyst for this reaction in order to accelerate the rate at which the product is formed. The general formula of an ester is RCOOR’ in
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Name SOLUBILITY CURVES Answer the following questions based on the solubility curve below. Which salt is least soluble in water .. at 2O° C? 2. How many grams of potassium chloride can be dissolved in 200 g of water at 80° C? IO 3. At 40° C‚ how much potassium _ __nitrate coin be dissoiu$tl ^n 30D.g of water? ------W- ’1 80 70 ...- O --60 0 5© 40 4. Which salt shows the least change 30 In solubility from 0° - 100° C? 20 10 At 30° C‚ 90 g of sodium
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measurement of the ability of an aqueous solution to carry an electric current. In this lab we produced conductivity tests to discover the differences between molecules and ions of various solutions such as Glucose‚ Sucrose‚ Ethanol‚ Sodium Chloride‚ Calcium Chloride‚ distilled‚ tap‚ pond and ocean water. The main point of the experiment was to test the hypothesis which is that distilled water has a decreased conductivity than other solutions. We wanted to find out specific data on these solutions in
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Strength In our positive control group‚ the rate of fermentation is the highest (Figure 2)‚ and the sample solution (corn syrup‚ yeast‚ and calcium chloride) was used up before the cut-off time (45 minutes). By
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Chemistry102 5/7/2013 Lecture Presentation Chapter 17 Additional Aspects of Aqueous Equilibria John D. Bookstaver St. Charles Community College Cottleville‚ MO © 2012 Pearson Education‚ Inc. Common Ion Effect HA(aq) + H2O(l) ⇔ A−(aq) + H3O+(aq) • Adding a salt containing the anion NaA‚ which • is the conjugate base of the acid (the common ion)‚ shifts the position of equilibrium to the left This causes the pH to be higher than the pH of the acid solution 9lowering the H3O+ ion concentration
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into a metal salt. (5) Dip your wire into a metal salt either the nitrate or chloride and place the wire onto the tip of the blue flame. (6) Observe the change in colour of the Bunsen burners flame and record the observations as you go. (7) As long as you clean the wire as directed in step 3-4 you can proceed into testing the other metal salts. QUESTIONS: Q1: Were there any main difference between the chloride salts and the nitrate salts? If there was please comment on what it was Yes‚
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Rationale: Mobility increases lung function and oxygen circulation. (Treas & Wilkinson‚ 2014‚ p. 616). d. Medications (cont’d) Amlodipine: 10 mg = 1 tab‚ oral‚ qAM for 90 days Amlodipine is an antihypertensive/calcium channel blocker which works by inhibiting the transport of calcium into myocardial and vascular smooth
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by metal ions or by ammonium ions. Compounds in which the H+ ions in an acid have been replaced by ammonium ions (NH4+) are called ammonium salts. NOTE: •An anion is a negatively charged ion. Hence:•Hydrochloric acid gives chlorides. E.g. sodium chloride‚ ammonium chloride. •Nitric acid gives nitrates. E.g. barium nitrate‚ copper nitrate. •Sulphuric acid gives sulphates. E.g. silver sulphate‚ iron (ii) sulphate. •Phosphoric acid gives phosphates. E.g. sodium phosphate‚ ammonium phosphate. •Each
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on the metal ion. This experiment contains Ammonium chloride buffer which is an inhalation irritant. Procedure: About 500 mL of approximately 0.004 M disodium EDTA solution needed. The solution should have between 0.7–0.8 g of Na2EDTA and dissolve in about 500 mL deionized water in a plastic bottle. The bottled is Sealed and shaken vigorously for a few minutes to dissolve the salt. Standardize the Na2EDTA solution using a stock calcium ion solution as the primary standard. Using a 10-mL
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" Soap Lab. Web. 31 May 2012. <http://course1.winona.edu/jfranz/Lab/soaplab.htm>. Appendices Figure 1: synthetic detergent when added with (from left) Ferum (II) chloride‚Magnesium (II) chloride‚ and Calcium (II) chloride Figure 2: soap when added with (from left) Ferum (II) chloride‚ Magnesium (II) chloride‚ and Calcium (II) chloride Figure 3: observation on cleanliness of cloth strip (from left) tape water‚ detergent‚ soap
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