CHEM 1105 Experiment 4: Determination of a Chemical Formula Introduction When atoms of one element combine with those of another‚ the combining ratio is typically an integer or a simple fraction. The simplest formula of a compound expresses that atom ratio. When two or more elements are present in a compound‚ the formula still indicates the atom ratio. To find the formula of a compound we need to find the mass of each of the elements in a weighed sample of that compound. For example‚
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of Groundwater Contamination I used the following materials: (8) 250 ml Beakers|Permanent marker|3 Wooden stir sticks|100 ml Graduated cylinder|10 ml Vegetable oil|10 ml Vinegar|10 ml|Liquid laundry detergent|100 ml Beaker|240 ml Soil|Funnel|Cheesecloth|Scissors|Water. With a marker the eight 250mL beakers were labeled number one through eight. Putting five through eight to the side‚ fill with beakers one through four with 100mL of water using the 100mL graduated cylinder
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Ammonium Hydroxide (NH4OH)(aq) ← Hydrochloric Acid (HCl)(aq) ← Zinc powder ← 2 100 ml Beakers ← 250 ml Waste Beaker ← 400 ml Beaker ← Filter paper ← Plastic Dropper ← 250 ml Erlenmeyer Flask ← Forceps ← Plastic Funnel ← Red Litmus paper ← Spatula ← Steel Wool ← Glass stirring rod ← Small test tube ← Tongs ← Wash bottle ← Watch Glass Procedure: I. Weigh a pre-1982 penny (should be around 3 grams) II. Measure 2mL of concentrated
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acid or inorganic base (HCl or NaOH) to the three-component mixture caused an immiscible appearance of the solution in the separatory funnel. By briskly shaking the separatory funnel with the mixed components created a build up of pressure which was released through the stopcock forming small disappearing bubbles within the tip of the separatory funnel. Once the funnel was placed back into the iron ring and the stopper was removed‚ the distinct upper ether layer had an oily appearance and a visible
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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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process. The student began with mixing 50 ml of aqueous benzoic acid with 10 ml of methylene chloride inside a seperatory funnel. The seperatory funnel was shaken for about one to two minutes to allow the two layers to separate. While shaking‚ it was important for the student to point the stopcock at an angle where venting the funnel would not be a problem. The stem of the funnel was to be pointed away from everyone in case any built-in pressure was not released on time. After performing these steps
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calcium carbonate from aqueous solutions of calcium chloride and sodium carbonate. These solutions will be prepared from 2.01 g of calcium chloride and 1.06 g of sodium carbonate . Materials: 3 beakers 100 mL graduated cylinder rubber policeman funnel filter paper Procedure: 1. Put on your safety goggles. 2. Obtain two clean beakers. Rinse the inside of the beakers with a small amount of distilled water. 3. Obtain the correct amounts of calcium chloride and sodium carbonate. Enter
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Oviducal funnel 3. Oviducts 4. Female genital aperture 5. Spermathaceae 1. Ovary- They are the white lobed structures which are present in the intersegment of 12/13. They consist of ova secreting cells. The ova are usually generated by the process of oogenesis. They are generally arranged on the basis of maturation. The matured ones are contained in the distal end whereas the immature ones are concentrated in the proximal end. 2. Oviducal funnel- A pair of funnel-like structure
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PLANNING Introduction Issue: Debate has erupted in Australia over these beauty contents as pageant organisers prepare to bring these events to our shores. Text type: Opinion Piece Source: The Age Date: May 4‚ 2011 Author’s name: Nina Funnel Contention: Argues that the bizarre world of pageantry is fake and fictitious. Headline: Sugar and Spice. But all things nice? Tone: Logical‚ strong‚ polished yet slightly colloquial tone Target Audience: Middle aged working mothers and
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LMTSOM 12 Personal selling Managing Sales Force PRATEEK PARBHAKAR 501204032 Contents Personal selling 3 The personal selling process consists of the following steps 3 Sales Management: 5 The Sales Funnel (or Sales Pipeline) 5 Sales tips 7 Sales promotion 8 Sales Promotion Strategies 8 Advantages 9 Disadvantages 9 Managing Sales Force 10 Designing of the Sales Force 11 BIBLOGRAPHY 12 Personal selling - Personal presentation by the firm’s sales force for the
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