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# Plot a graph of solubility of kno3(g kno3 100 g h2o

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Unformatted text preview: Plot a graph of solubility of KNO3 (g KNO3 / 100 g H2O) vs. Temperature(oC) and place it here. Cover this instruction box so that you graph is appropriately sized. Be sure to include a title, axis labels, and use the chart type that connects the data points. Note: You added a volume of water to the test tube. Assuming a density of 1.0g/mL, enter the g of water used in this part of the experiment. Use this when calculating the solubility in the table below. Note: Data is being restated here for ease in plot ing. The cel s for % impurity wil autofil from cel s G56, G122, and G155. Use the “slope” and “intercept” functions in Excel to get the slope and y-int. for calculating ∆ Hºsoln and ∆ Sºsoln. You did this in the report for Lab 2. By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that al calculations and responses other than the reporting of raw data are your own independent work. Failure to sign this declaration wil cost you 5 points. Signature: Type your calculation for molarity of Fe2+ (1 mol fer oin = 1 mol Fe2+) (0.104g)/(596.27g/mol)= 1.74e-4 mol Fer oin = 1.74e-4 mol Fe2+ (1.74e-4 mol Fe2+)/(0.01 L)= 1.74e-2 M Fe2+ Type your calculation for moles of Fe2+ ERROR:please see #4 in evaluation we forgot the step of saving a KNO3 portion therefore, we are unable to obtain an accurate numerica value for the moles of Fe+ in the solution. Hypothetical y speaking, we were supposed to save about 0.1 grams, so the calculation for saving 0.1 g is: 0.1g/(55.845 g/mol)= 1.79e-3 mol Fe2+ Type your calculation for grams of (NH4)2Fe(SO4)2.6H2O 1.79e-3mol Fe2+ = 1.79e-3mol (NH4)2Fe(SO4)2.6H2O) (1.79e-3mol (NH4)2Fe(SO4)2.6H2O) *(391.975 g/mol (NH4)2Fe(SO4)2.6H2O) = 0.702 g (NH4)2Fe(SO4)2.6H2O) Type your calculation for % mass of (NH4)2Fe(SO4)2.6H2O in the crystals. 0.398g crystals + 0.1g crystals = 0.498 g crystals 0.1g/0.498g= 0.2008 x 100%= 20.08% (NH4)2Fe(SO4)2.6H2O) crystals 55.845g Fe2+/(391.975g (NH4)2Fe(SO4)2.6H2O) = 0.142*0.2008= 0.0285*100%= 2.85% Laboratory Waste Evaluation (1 pt) Laboratory waste is considered anything generated during an experiment that is disposed of down the sewer drain, thrown in the garbage, col ected in a container for disposal by the UW Environmental Health & Safety department, or released into the environment. Based on the writ en lab procedure and your actions during the lab, list the identity and approximate amount (mass or volume) of waste that you generated while performing this experiment. ice for ice bath 100 ml water 0.5 g (NH4)2Fe(SO4)2.6H2O 4.5 g KNO3 few filter papers a few drops of water 7ml of water 2 ml hydroxylamine solution 5 ml phenanthroline solution 150 ml water 7 g KNO3 Note: Al sections of this report must be typed. 0.5 1 1.5 2 2.5 0.000 2.000 4.000 6.000 8.000 10.000 12.000 14.000 % Impurity vs Crystalization Number Crystalization Number % Impurity 0.5 1 1.5 2 2.5 0.0 20.0 40.0 60.0 80.0 100.0 120.0 % of Original KNO3 Mass vs Crystalization Number Crystalization Number % of Original KNO3 Mass 20 30 40 50 60 70 80 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 f(x) = 0.0010118405x - 0.0066362359 R² = 0.9793599671 Cryst. Temp (C) vs Solubility (gKNO3/100g water) Cryst. Temp, C Solubility, gKNO3/100g water...
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