Title: Stoichiometry of a Precipitation Reaction Purpose: The purpose is to predict the amount of precipitation using stoichiometry. Another purpose is to measure and calculate percentage yield. Procedure: 1. Weigh out 1.0g of CaCl2*2H2O and put it into a 100mL beaker. 2. Add 25mL of distilled water and stir. 3. Using stoichiometry to determine how much Na2CO3 is needed for a full reaction. 4. Weigh the calculated amount and put it in a small paper cup. Add 25mL distilled water and stir
Premium Stoichiometry Yield Water
silver nitrate. This single replacement reaction will produce a blue solution of copper II nitrate and solid silver. By weighing the reactants before the reaction‚ the mass of silver produced can be predicted. This theoretical yield can be compared to the actual yield of silver. Purpose Students will compare the theoretical mass of silver with the actual mass of silver from the single replacement reaction between copper and silver nitrate. Materials Copper wire stirring rod 18 x 150 mm
Premium Silver Stoichiometry Copper
turned blue - Postlab Questions 1. Whas is the theoretical yield of casein based on the table of Milk Composition Analysis? 3.3 % 2. What is your percent yield? 3.2g/3.9g x 100= 82% 3. Why might your percent yield be lower than expected? More fat has a decrease in protein which would cause a lower percent yield. 4. Why might your percent yield be higher than expected? Less fat causes an increase in protein‚ thus giving a higher percent yield. 5. In the precipitation of casein‚ why is it important
Premium Milk Cheese Yield
to complete. OBJECTIVE 1. Predict the amount of product produced in a precipitation reaction using stoichiometry 2. Accurately measure the reactants and products of the reaction 3. Determine the actual and theoretical yield 4. Calculate percent yield PROCEDURE Please complete the entire experiment as instructed in the lab manual except for any modifications noted below. Fill out the report below‚ insert your digital photograph(s) into the report‚ and submit it me electronically
Premium Stoichiometry Yield Filter paper
evaporated 1.00 g of sodium carbonate and 1.00 g of lead II nitrate was given to start the lab out with. To calculate the percent yield of lead II carbonate‚ the limiting reactant must be identified first. 1.00 g Na2CO3 x 1 mole106 g = 0.00943 mole Na2CO3 1.00 g Pb(NO3)2 x 1 mole331 g = .00302 mole Pb(NO3)2 Limiting reactant: lead II nitrate Next‚ the theoretical yield of lead II
Premium Stoichiometry Water Yield
Mass of filter paper and dry calcium carbonate __1.7__g Net mass of the dry calcium carbonate ___0.7_g (This is the actual yield) Step 11: Show the calculation of the theoretical yield of calcium carbonate. .0068 mol of CaCO3 *100.06 g CaCO3/1mol of CaCO3 =.6804 g of CaCO3 Show the calculation of the percent yield. (Actual yield/theoretical yield)*100 = (.7/.68)*100 =102% Conclusion: The objectives of this experiment were to use stoichiometry as a method to predict
Premium Stoichiometry Solubility Measurement
Purpose=The purpose of this lab was to combine reactants‚ which we would pick ourself‚ to make 2 grams of Copper Phosphate and another product. Background: Chemistry is the branch of science that deals with the identification of the substances of which matter is composed. Chemistry has to do with many things we use today. For example‚ fireworks are made by the chemical combining magnesium‚ titanium‚ copper‚ aluminum‚ strontium‚ or other periodical elements. Things also like making plastic‚ jewelry
Premium Chemical reaction Stoichiometry Reagent
Temperature: (122.2+126.1)/2 = 124.15 °C Average MP Range: 120.75 - 124.15 °C Actual MP of Benzoic Acid: 122.4 °C (Fisher Scientific MSDS #02720: Benzoic Acid) Discussion: The results of the experiment show a percent yield of 34.34% for the first trial (Part A)‚ and a percent yield of 84.0% for the second trial (Part B). The methods for both trials were generally the same‚ so the large difference is attributed to the fact that the beaker broke before the gravity-filtering step in the first trial
Premium Water Carboxylic acid Salicylic acid
Williamson Ether Synthesis specializing in producing ethers‚ it was ideal for this lab because of the alcohol and the alkyl halide used. After the synthesis and isolation of Gauifenesin was completed‚ the melting point ranges were observed and percentage yields were calculated to compare with the values of authentic guaifenesin and guaiacol. Reflux was used to synthesize Guaifenesin. Guaifenesin is an expectorant‚ meaning it helps loosen congestion in one’s chest and throat‚ making it easier to cough
Premium Alcohol Stoichiometry Yield
Limiting Reagent and Percent Yield Aim To determine the limiting reagent between the reaction of lead (II) nitrate and potassium iodide. To determine the percent yield of lead (II) iodide. Date Started: 13/4/12. Finished: 19/4/12. Data collection and processing Measurements: * Amount of distilled water: 75.0ml ± 0.5ml. * Mass of watch glass: 31.65g ± 0.01g. * Mass of watch glass + potassium iodide: 32.45g ± 0.01g. * Mass of potassium iodide: 0.8g ± 0.02g. * Mass of watch
Premium Stoichiometry Yield Molecule