
4. Why do you think only two drops of phenolphthalein are used in these titrations (HINT:...
Phenolphthalein is used in titrating KHP with NaOH. Why? Is phenolphthalein required for a potentiometric titration of a weak acid with NaOH? Why or why not?
find the term isosbestic point.? [a. Explain why the isobestic point would be a poor choice of wavelength for determiningpKa? 5. Phenolphthalein is an indicator often used for weak acid-strong base titrations. The acid form of phenolphthalein is colorless and the base form is pink. Do you think the pKa of phenolphthalein would be determined using the same the method from this experiment to find the pKa for bromothymol blue? Explain why or why not? I dont need the answer...
Consider the structures of KHP and phenolphthalein and explain why each has a single acidic hydrogen (one that dissociates as a weak acid) when there are several hydrogen atoms in the structure (HINT: Review the rules for predicting acid strength).
(4.) The flask shown here contains 0.636 g of acid and a few drops of phenolphthalein indicator dissolved in water. The buret contains 0.240 M NaOH. What volume of base is needed to reach the end point of the titration? Assuming the acid is monoprotic, what is its molar mass? (5.) 20.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 39.09 mL of a 0.1315 M NaOH solution. What is the concentration...
In lab I performed two strong base/weak acid titrations with two different analytes. I also performed a blank titration with only water as the analyte. What was the point of the blank titration?
If you were titrating using methyl Orange and phenolphthalein as the indicators for Na2CO3. if you used NaHSO4 instead of Na2CO3, would you need to use two indicators for titration? Why or why not?
Why do you think most firms issue debt instead of only issuing equity? explain. Why do you think a highly profitable firm like Apple (AAPL), with almost $250 BILLION of cash on hands, would issue debt? explain.
Why do you think the 'Summit Series' was so important, not only for Canada but in the world?
Why do you think it is important to only consider only relevant costs when conducting a differential analysis? Why not consider all possible costs in your decision. Be sure to provide examples to back up your ideas. TOPIC: Differential Analysis
WHY do you think economic profit would be used in merger discussions?