Chemicals Used: Propanoic acid Pyrrole Benzaldehyde Methanol N‚N- dimethylformamide TPP Copper Acetate Equipment Used: Round Bottom flask Graduated Plastic Syringes Erlenmeyer flask Hot plate Ice Bath IV. Experimental Procedure Step 1: Placed 18.6 mL of propanoic acid in a 100ml round-bottomed flask with boiling chips‚ fit a reflux condenser and brought the acid to reflux. Simultaneously‚ added .33mL of pyrrole and .47 mL of benzaldehyde through the condenser
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Introduction: Calcium hydroxide is a soft white caustic powder used in making mortar‚ cements‚ calcium salts‚ paints‚ and petrochemicals. It is also used in saltwater aquaria to make up kalkwasser/limewater solutions for reef tanks‚ and is used as a pH regulating agent. Notice that calcium hydroxide is divalent and thus has twice the neutralizing power as molecules like NaOH that are monovalent. A Calcium Hydroxide Molecule: Calcium hydroxide is manufactured industrially by adding
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beaker. Now take the weighting dish with the mixture and carefully pour into the 100ml of water. With a stirring rod stir the substance for roughly 30 seconds. Place a sheet of filter paper inside the funnel and place the funnel on top of the Erlenmeyer flask. Pour the beaker with the combination of water and mixture slowly into the funnel until all water is filtered through; leaving only the solid components behind. The remaining solids should now be poured into a beaker‚ and added with 50ml of water
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pouring 2.0 ml of cyclohexanol and 1.0 ml of acetic acid into a 250 ml Erlenmeyer flask. Under a fume hood‚ slowly add 30 ml of bleach‚ and oxidizing agent‚ to the mixture and stir for 20 minutes. Acetic acid will react with bleach to make it a better oxidizing agent and form hopochlorous acid. Hypochlorous acid will then oxidize cyclohexanol. The mixture turned cloudy during the process but clear up after a few minutes. The flask will be warm since this is an exothermic reaction. Next‚ the mixture
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assembled a reflux apparatus in the fume hood with a 100 mL round bottom flask and a condenser. Next we added 44 mL of sulfuric acid to a 125 mL Erlenmeyer flask. We also measured 4.75g ammonium chloride and 8.75g ammonium bromide into a 125 mL beaker‚ crushed the lumps‚ and placed in a 250 mL Erlenmeyer flask along with the sulfuric acid. We used heat to help the solutes dissolve. When they had dissolved‚ we allowed the flask to cool and then poured 17 mL of the solution into a separatory funnel
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Determination of Calcium Carbonate in Eggshells – Background The major component of eggshells is calcium carbonate‚ CaCO3(s). This analysis is done volumetrically by using a characteristic reaction of carbonate compounds‚ namely their reaction with acids. Calcium carbonate (limestone) is very insoluble in pure water but readily reacts in acid according to the reaction below. 2HCl(aq) + CaCO3(s) → CaCl2(aq) + CO2(g) + H2O(l) + HCl(aq) (in excess) (limiting reagent) (1) (unreacted)
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degrees Celsius causing the liquid unknown to evaporate into a gas while recording the mass‚ volume‚ temperature‚ and volume. This provided the mass of 1.6 grams which was found by subtracting the mass of the Erlenmeyer flask‚ aluminum cover‚ and rubber band from the mass of the Erlenmeyer flask‚ aluminum cover and rubber band and unknown gas after heating. Then the temperature of the gas was determined by taking the temperature of the hot water which was 94 and converting it to Kelvin by adding 273
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acid in a sample of vinegar is 0.83 mol/L. VCH3COOH (aq) = 10.00 mL VNaOH (aq) = ? CCH3COOH = 0.83 mol/L CNaOH (aq) = 0.145 mol/L Materials: Sodium hydroxide 100 mL Acetic acid 50 mL 250 mL beaker x 2 Distilled water x 1 bottle Erlenmeyer flask x 1 Burette x 1 Pipette x 1 Pipette bulb x 1 Volumetric pipette x 1 Phenolphalein Procedure: Step 1- Gather materials‚ put on eyeglasses and apron. Step 2- Pour 50 mL of acetic acid into one 250 beaker and 100 mL of sodium hydroxide
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Then we added 3 mL of Acetic anhydride and 2 drops of concentrated Sulfuric acid. Swirl the flask for proper mixing. Then the group proceeded to warm the Erlenmeyer flask and the contents in a water bath to 95°C for 10 minutes. When the temperature was reached and kept for 10 minutes we took the flask away from heat and allowed it to cool to room temperature. We then added 50 mL of cold DI water to the flask. Stirring well to allow the crystals to form. We then filtered the crystals using a vacuum
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Balance Erlenmeyer flask Funnel pH sensor or pH meter Ring stand and buret clamp 250-mL beaker 50-mL buret KHP Procedure: Part 1: Standardization of a Sodium Hydroxide Solution 1. Obtain a sample of pre-dried potassium hydrogen phthalate (KHP) 2. Weigh 0.4-0.6 grams of KHP‚ then record in Data Table 1. 3. Transfer the KHP into the Erlenmeyer flask using the funnel‚ then use the spray bottle to get any remaining solid into the flask. 4. Add 40 mL of water to the flask and whirl
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