. The determination in problem 15-9 was modified to use the standard addition method. In this case, a 4.236 g tablet was dissolved in sufficient 0.10M HCl to give 1.00 L. Dilution of 20.00 mL aliquot to 100 mL yielded a solution that gave reading of 448 at 347.5 nm. A second 20.00 mL aliquot was mixed with 10 mL of 50 ppm quinine solution before dilution to 100 mL. The fluorescence intensity of this solution was 525. Calculate the percentage of quinine in the tablet.
Solved
Show answers
More tips
- B Business and Finance How to Open an Online Store? A Detailed Guide for Beginners...
- L Leisure and Entertainment What can be considered an antique: defining and valuing old objects...
- L Leisure and Entertainment Choosing the Right Books to Read: Tips and Recommendations...
- C Computers and Internet Step-by-Step Guide on How to Download Music to Your iPhone...
- H Health and Medicine Naskol ko Opasen Ukus Kleshcha i Kak Ego Raspoznat...
- F Family and Home How to Choose Suitable Windows for Your Home?...
- L Leisure and Entertainment What Movies You Should Watch: A Guideline to Make the Right Decision...
- L Leisure and Entertainment How to Identify a Song? Which Program Can Recognize a Song by Its Melody?...
- H Health and Medicine Coughing: Causes, Types, and Treatment Methods...
- F Family and Home Parquet or laminate, which is better?...
Answers on questions: Chemistry
- C Chemistry Part 3: Applying Models 7. Compare the behavior of the particles in hot tea with the behavior of the particles in ice cream. How are they similar? How are they different?...
- P Physics When you take a sharp turn in a car your body leans in direction opposite to turn which of these statements is true...
- M Mathematics Okay yes i need a lot of help okay...
- B Biology The effects of osmotic water shifts on red blood cells (RBC) can be observed experimentally by exposing the cells to hypertonic and hypotonic saline solutions. The inner fluid...
- M Mathematics Step 4: What is the common factor in both terms of the resulting expression? 2x 3 = (2x+ + 6x) + (5. Group 1 = 2x(x + 3) + (5x + x + 3 = 2x(x + 3) + 5(x = Step 5: Use the distributive...
Ответ:
Explanation:
The melting of the chocolate pieces one by one showed that it was caused by heat flowing through the foil bridge. The transfer of heat happened between the foil bridge and the chocolate pieces because they were touching each other.