Equilibrium: Le Chatelier's Principle And Measurem

3/16/10 Mr. Min Li chemical equilibrium: Le Chateliers Principle and Measurement of Equilibrium ceaseless 1. Does the measured fender subject of the ortho orthophosphate fan touch with your acceptations? Why or why not? (In other words, bear the expected pilot program capacity of the relent establish on the flesh of moles of HPO42- in the modify and equality this to the measured buffer capacity.) Yes, I felt that the buffer did thusly tally my expectations. The buffer capacity based on the number of moles of HPO42- is 3.63. Buffers is ab away effective when the pH=pKa ± 1.0. 2. What do you expect would be the buffer capacity of the phosphate buffer for intake of NaOH? Explain. I expect the buffer capacity of the phosphate buffer for consumption of NaOH is 4.95. The pH of the solution was 5.25 and by using the relationship of pH and pKa (pH = pKa + logarithm ([A-]/[HA])) I was able to get the buffer capacity. The buffer checks out because pH =pKa ± 1.0. Results: Phosphate buffer: The initial pH for the phosphate buffer is 6.83 and it takes 18 drops to equal 1.0 mL of 1.0 M HCl.

The multitude of HCl required to break the buffer was 1mL, and the known tightfistedness of the HCl 1.0 M The number of moles of HCl consumed by the buffer was 0.02. [pic] Acetate buffer: The goat pH of NaCH3CO2 was 5.25 and the actual measured pH for the ethanoate rayon buffer was 11.21. The number of drops to equal 1Ml of NaOH is 17 drops. To reach the pH the 7, 2.4mL of NaOH was added to the solution. The script of NaOH required to break the buffe r is 2mL, and the concentration of NaOH was ! , calculate and accounting the number of moles of NaOH consumed by the buffer was .02. This is the buffer capacity of the acetate buffer to consume NaOH reaches 7.0. [pic]If you want to get a safe essay, order it on our website: BestEssayCheap.com

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