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Reaction Between Sodium Bicarbonate And Calcium Chloride

3629 Words15 Pages

Lab Final

Mrs. Hsi/Horne

Redmond High School

January 6th 2015

Maddi Bibby and Lisa Brinton

Abstract

The purpose of this lab is to observe the reaction between sodium bicarbonate and calcium chloride take place, determine which of the reactants is the limiting reactant and which is the excess reactant, determine the theoretical mass of the precipitate that should form, and compare the actual mass with the theoretical mass of the precipitate and calculate the percent yield. In the lab, it was determined that Na

CO

had an average final mass of 7.41g after the three trials were performed. It was found that CaCl

had an average final mass of 5.53g from the three trials performed. (Data Table 1) When Na

CO

was mixed with water, it …show more content…

Sodium carbonate, known for being found in soaps in glass, is soluble when mixed with water. When in its pure form, it is a white, odorless powder that can absorb moisture from the air (Sodium). On the other hand, calcium chloride can be used to melt ice on the roads, control dust, and act as a preservative for foods. It too rapidly absorbs water, but is a crystalline, lumpy or flaky texture that is usually white and quite soluble in water (Calcium). To understand this lab completely, it is important to know the concepts limiting and excess reactant. A limiting reactant is the reactant that limits the amount of product that can be produced in a reaction. An excess reactant is the opposite, or the reactant that remains after a chemical reaction is performed and the limiting reactant runs out (Stoichiometry: Limiting). The stoichiometry calculations determining what should happen can be found in the calculations section. The solid should form calcium carbonate. The uses for calcium carbonate are as a filler and coating pigment in paper, plastics, paints, and coatings. Also, it is a very effective dietary supplement and is critical to the construction industry as a building material. This solid is extremely important and necessary in everyday life (What …show more content…

One error that could have affected the percent yield is not filtering out all of the liquid from the filter paper in the funnel before setting it off to dry. This would have increased the final mass of the solid, not making it accurate. To stop this from happening again, the liquid could be drained more thoroughly until it fully stops dripping into the Erlenmeyer flask. Another error that could have affected the percent yield is the amount of trials performed. This would have made the results less accurate and made any errors change the final results even more. To make sure this doesn’t happen, there needs to be more trials to increase the precision of the results.

Abstract

The purpose of the lab was to determine what each of nice substances was based upon how they reacted with other chemicals as well as their pH levels. By using the given clues, the reaction with Litmus paper, and the precipitates formed by different mixtures, the chemicals were identified. Substance 1 was found to be BaCl

, substance 2 was determined to be NaOH, and substance 3 was labeled as CuSO

. Substance 4 was found to be NH

Cl, substance 5 was determined to be AgNO

, and substance 6 was labeled as HCl. Finally, substance 7 was found to be NaBR, substance 8 was determined to be

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