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Baking Soda Lab Report

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Introduction Baking soda is a common household item. It is used for a variety of things from cooking to cleaning. Baking soda is synthesised on an industrial scale using the Solvay process. The Solvay process consist of using limestone and extreme heat in order to break down the limestone into carbon dioxide and calcium oxide.1 CaCO3(s)→ CO2(g) + CaO(s) The carbon dioxide is then combined with a concentrated solution of water, sodium chloride, and ammonium. The ammonia and water react to make ammonium hydroxide that reacts with sodium and carbon dioxide to form sodium bicarbonate. CO2(g) +NH3(aq)+NaCl(aq)+H2O(l)→NaHCO3(s)+NH4Cl(g)2 The Solvay process then recycles the ammonia by performing an acid base reaction. The calcium oxide is combined …show more content…

Next, 50 mL of water was poured in a side arm flask with a stopper and a nalgene tube connecting to the stopper of the flask limestone flask. A tube with a pipet that was placed in a flask containing saturated ammonium carbonate and sodium chloride solution was connected to the side arm of the flask. Then 50 mL of 6M HCl was added 1 mL at a time to the thistle tube. The hydrochloric acid and calcium carbonate reacted to form carbon dioxide which moved through the tubes into the flask containing ammonium carbonate. The carbon dioxide and ammonium carbonate/sodium chloride solution reacted to form the sodium …show more content…

Results and Discussions After filtration, 5.256 g of sodium bicarbonate was obtained. An experimental error in this experiment was that 100 percent of the carbon dioxide did not go through the nalgene tube because some went up the thistle tube. Another source of experimental error was that not all of the sodium bicarbonate could be rinsed off of the glassware and not all of it was filtered. Both sources of experimental error led to a lower yield. Precipitation reactions could have been done to confirm the presence of carbonate ions in the product. Either calcium, copper, iron, magnesium, or silver could have been added to the product and carbonate would have precipitated out. Using stoichiometry and the mole to mole ratio from the 2nd formula listed above, it was found that 3x108 Kg of carbon dioxide is needed to produce the 700,000 tons of Arm and Hammer baking soda. In order to obtain the 5.256 g of product, 2.753 g of carbon dioxide was converted into sodium

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