Essay on Experiment 8 Limiting Reactant

Words: 1364
Pages: 6
Open Document
Limiting

Reactant

(Experiment #8)

CHM 1045L

Lucy Garcia

Misturah Abdulkareem,

Alexander Gonzalez,

Oluseun Fajimolu

Dr. Abuzar Kabir

Purpose/Abstract

The purpose of this lab was to determine the limiting reactant in a mixture of to soluble salts and the percent composition of each substance in a salt mixture.

Procedure/Method

First, we were to measure and record the mass of a beaker, then transfer about 1 gram of the salt mixture into the beaker, measure, and record the combined mass. Then, we had to fill a 400-ml beaker with deionized water and test it to make sure that the ph was just basic. We then combined the deionized water and salt by adding about 150ml of the deionized …show more content…
In order to obtain the most accurate amount of precipitate one must also use a fine-porosity filter paper to reduce the amount of precipitate that passes through the filter. When transferring the precipitate into the filter, it is important not to allow the flow of the liquid to supersede the rim of the filter paper within the filter funnel, otherwise some product may be lost in the filtering process.

CONCLUSION

We were able to identify the limiting and excess reactant in the mixture of the two soluble salts. Our salts were CaCl2*2H2o/K2C2O4*H2O. When we tested for excess C2O42- in test tube 1, no precipitation formed. When we tested for excess Ca2+ , precipitate did form. Therefore, we concluded that our limiting reactant in the salt mixture was K2C2O4*H2O and our excess reactant in the salt mixture was CaCl2*2H2O. We further found that the percent of the limiting reacting in the salt mixture was 34.6% in trial 1 and 17.6% in trial 2. This information lead us into finding the percent excess reactant in the salt mixture which was 65.4% in trial 1 and 82.4 % in trial two. I believe that we may improve the results obtained by using a finer porosity filter paper, other than the one used, and a vacuum filtering apparatus. This would shorten the filtering time and with the aid of a finer porosity filter, we can still obtain accurate results. If
Show More

Related Documents: Essay on Experiment 8 Limiting Reactant

Experiment 5 Essay

find the mole ratio of reactants. Mixing different volumes of the two reactants resulted in different temperature changes. The temperature change was directly proportional to the quantity of reactants consumed because the experiment was designed so that the volume of solution and the total number of moles of reactants was a constant for the series of experiments. Thus, the optimum ratio(determined after the results of the trials are graphed) is the ratio of the volume of reactants that consumed the greatest…

Words 567 - Pages 3

2010 Ch 3 Review Sheet Essay

What is the percent composition of each element in each product? 6. The total amount of the sample collected by the chemist is 67.32g. Calculate the mass of the reactant used from the air to react with the sample. 7. Calculate the number of moles of the reactant from the air. 8. Calculate the number of particles of the reactant from the air. Identify the type of particle. 9. Calculate the theoretical yield of all products formed from the reaction. 10. Calculate the percent yield…

Words 392 - Pages 2

In Class Questions Essay

number of each element on both the reactant and product sides of the equation. These stoichiometric coefficients are useful since they establish the mole ratio between reactants and products. 2. Write the balanced equation (including states) for the reaction observed in this experiment Na2CO3(s)+CaCl2(s)CaCO3(s)+2NaCl(aq) 3. Classify the chemical reaction This type of chemical reaction is a double displacement reaction 4. Which reactant is the limiting? Show all steps in your calculations…

Words 297 - Pages 2

Summary Of Lab: Synthesis Of Zinc Chloride

Independent variable: Reacting the zinc and hydrochloric acid. Dependent variable: The result of the hydrochloric acid and zinc. Hypotheses: I hypothesize that the ratio of zinc(reactant)…

Words 1528 - Pages 7

Saponifacation of Ethyl Acetate and Soldium Hydroxide Essay

Ethyl Acetate – NaOH Reaction Kinetics Experiment Martin Novick Group 14, Chemical Engineering Laboratory Submitted to Prof. David B. Henthorn September 25, 2012 Summary The goal of this project was to determine the pre-exponential factor, k o , the activation energy, E, and the reaction rate constants, k, of the saponification process of ethyl acetate using sodium hydroxide (NaOH) at 5 temperature between 15 and 25 degrees Celsius. Two trails were performed at temperatures 16, 18, 20, 22, and 24…

Words 3356 - Pages 14

6.03 Calorimetry Lab

will not stay the same because they do not follow the same reactions of H+ and OH–. 4. Part B. Heat loss to the calorimeter = (2.35g) × (6.22℃) × (1.34 J/g•℃) = 19.6 J. 5. Part B.3. As Jacob added 40.0 mL of 1.1 M HCl to 50.0 mL of 1.0 M NaOH, the limiting reaction now is HCl because the moles of HCl is less than the moles of NaOH. Thus, the moles of H2O has to be calculated based on the moles of…

Words 1216 - Pages 5

How Does The Concentration Of Sodium Carbonate Affect The Rate Of Reaction With Chloric Acid

affect the rate of its reaction with chloric acid? Background information The rate of a reaction does not stay the same. There are many factors that may affect how fast substances react. For example, surface area, concentration and temperature of reactants can affect the rate. However, sometimes it is hard to tell the specific rate because no phenomena can be observed. When sodium carbonate is reacting with an acid, one of the products is carbon dioxide gas. From the bubbles produced in the solution…

Words 716 - Pages 3

Essay on Lab synthesis

Heating Under Reflux: Syntehsis of Salicylic Acid from wintergreen oil Purpose: To prepare salicyclic acid from the methyl salicylate and find out whether or not it differs chemically from that made directly from benzene. In this experiments we will determine if there are synthetic pathways that cause product formation differences. We will carry out an organic synthesis, the preparation of salicylic acid from methyl salycilate.. An alkaline environment will push the reacting material in the…

Words 499 - Pages 2

Essay about Reaction Iodoethane with Saccharin, an Ambident Nucleophile

Discussion: In this experiment, we alkylate sodium saccharin to N-ethylsaccharin with iodoethane in an aprotic solvent N,N dimethylformamide. Nucleophiles in this experiment will react better in an aprotic solvent. Aprotic solvents have dipoles due to its polar bonds but they do not have H atoms that can be donated into a H-bond. The anions which are the O- and N- of sodium saccharin are not solvated therefore are “naked” and the reaction is not inhibited and preceded in an accelerated rate.…

Words 1068 - Pages 5

The Preparation of Calcium Carbonate Lab Essay

calcium chloride were used up. Also to see if there’s any alterations like mass differentials. Objectives: 1. To introduce the concept of “limiting factor” in a chemical reaction 2. To practice a. Writing a balanced equation b. Determining the number of moles of each reactant and product c. Deciding which chemical is the limiting factor d. Predict theoretical yield e. Determine actual yield f. Use error discussion Materials: * 2 beakers * 2…

Words 927 - Pages 4