Florida International Department of Chemistry and B Post Lab Answer the followin
ID: 486799 • Letter: F
Question
Florida International Department of Chemistry and B Post Lab Answer the following questions in your discussion 1. What is the purpose of calibrating a pH meter? potassium was available to create a standardized basic solution, could another base such different hydroxide (Ko be used instead? What would be the consequences of using base? 3. Does it matter how much water was used to dissolve the KHP? Why or why not? a. Does it matter whether the grams of KHP was accurately measured? Why or 4. If you had ofthe same the HCI solution, how would the volume of Ca(OH)2 necessary to reach the equivalence pointhe different than that the NaoH solution? How many oH ions are produced with Ca(oH)z versus NaoH? 5. How would your results be different if the unknown HCI solution i part2 was measured graduated cylinder instead of a volumetric pipet? 6. For both of the experiment, why was it necessary to perform each titration threetint a. parts titration the equivalence point? drop Why was it important to continue the buret when using the Why would a steady stream cause you to start over? 7. How would your results be different if you placed the unknown HCl solution in the buretat placed the standardized NaOH solution in the beaker? 8. How does the precision required for Part 1 differ from that of Part 2? the experiment?Hou 9. What are some sources of errors that are associated with both parts of can you prevent these errors?Explanation / Answer
Q1.
we calibrate the pH meter in order to know if readings/measures are correct and are precise. If we do not do this... then we will have deviations in pH measurements
Q2.
NaOH --> KOH could be used... the nly consequence is changing the MOLAR MASS of each, but since both are very caustic bases, they will behave similar
Q3.
YES, it matters, since the mroe water we use, the less concentrated KHP will be
a. it also matters if we measure KHP accurate, since we need it for calculations
Q4.
The volume shuld be EXACTLY the half of that of a monobasic substance, that is, 2OH per mol of Ca(OH)2
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