Why is it a good idea to perform three trials at each concentration? How would you modify the experiment to produce more reliable results?

Construct the expression for Kc for the following reaction. FeO(s) + H,(g) = Fe(s) + H,O(g) 1 Drag the tiles into the numerator or denominator to form the expression. Ke SRESET [FeO] 2[FeO] [FeO]? [H] 2[H] [HJP [Fe] 2[Fe] [Fe]? [H.O] 2[H,O] [H,O? II

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Part 1. Percent Recovery.. A student starts the recrystallization of benzoic acid experiment with 0.592 g of crude material. After recrystallization they recover a sample of benzoic acid weighing 0.305 g of pure benzoic acid. The molecular weight of benzoic acid is 122.1 g/mol. Calculate the percent recovery of benzoic acid. Please show your work and round your answer to the nearest whole number.

In any manufacturing process, reaction monitoring ensures that a chemical reaction proceeds as expected. Table 1 shows the monitoring data for the formation of chlorohexane, collected using a technique called gas chromatography. Note that the concentrations of the chlorohexane solutions are given in millimoles per litre (mmol l–1). The abbreviation mM (millimolar) is frequently used. Plot a graph of the data in Table 1. The graph should be drawn on graph paper or use fine grid if it’s drawn on Excel. Elapsed Time/Hours  Concentration of Chlorohexane/mM 0 0 2 40 4 65 6 80 8 90 10 95 12 99

Think about the situation where you are investigating the relationship of study time vs. exam grade.a. Which variable would be on the x-axis (and why)?b. Which variable would be on the y-axis (and why)?c. Would you expect the slope to be positive or negative (and Why)? 2) Contrast and compare interpolation with extrapolation. Which is “safer” to use and why?3) Look up how “the best fit straight line” is constructed. The term “Least squares” should be in your explanation.4) If I plot some data and end up with a r2 of (-) 0.99, is my plot useless? Explain.

Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CuSO4·5H2O) by taring using a clean and dry empty 250-ml beaker. 2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker. 3. Dissolve all the crystals of CuSO4·5H2O in the water using a clean glass rod for stirring. 4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric flask. This is called quantitative transfer of the solution. 5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to use a dropper to add the last few drops of water to ensure the meniscus is on the calibration mark). Close the volumetric flask with a stopper and mix the solution well (so that it is homogeneous). 6. You have now prepared a standard solution (or…

Thermodynamics 1-5

After performing Part A of the experiment, a student obtained the following concentrations for sodium hydroxide. Calculate the average concentration. Report your answer with four places after the decimal. Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 0.977 1.015 0.915 0.943 1.037 0.969

What is the Mass of solvent in grams? Add together the masses of the liquid water and ice added to the calorimeter. Convert the volume of liquid water to mass using 1.000 g/mL as the density of water (see procedure for volume used). Side note:Molarity of the solution is  0.76612903225806