can you kindly answer all the questions and number the questions accordingly. this module is analytical chemistry.
Posted: Thu Dec 02, 2021 5:32 am
can you kindly answer all the questions and number the questions accordingly. this module is analytical chemistry.
Question 3 35 Marks a. C. Na = 4 a 1+ e. 3.1 Substances A and B have retention times 8.20 and 8.815 min, respectively, on a 30.0 cm column. An unretained species passes through the column in 1.30 min. The peak withs (at base) foe A ana B are 0.555 and 0.605 min, respectively. Calculate: The column resolution (3 Marks) b. The average number of theoretical plates in the column. (2 Marks) The plate height (2 Marks) d. The length of the column required to achieve a resolution of 1.5. Note that Rs = ) and the quantities K and a do not change greatly with increasing N and L. Substitute N1 and N2 in this equation and divide. (5 Marks) The time required to elute substance B on the column that Rs value of 1.5. Note that tr = 16 R$ 11a/(a – 1))2 (4****) and the quantities K and a do not change greatly with increasing N and L. Substitute Rs1 and Rs2 in this equation and divide. (5 Marks) 3.2 The drug tolbutamine (Molar mass = 270 g/mol) has a molar absorptivity of 703 at 262 nm. One tablet is dissolved in water and diluted to a volume of 2 L. The solution exhibits an absorbance equal to 0.680 in a 1 cm cell. In which region of the electromagnetic spectrum the drug absorbs the radiation? (1 Marks) b. Calculate the transmittance and % transmittance of the drug solution. (4 Marks) Calculate the concentration of the drug solution (3 Marks) d. Calculate the mass of tolbutamine contained in the tablet. (3 Marks) a. C. a. 3.3 Spectroscopic methods are based on the interaction of electromagnetism ration with matter. What type of electrons in a molecule are generally involve in UV or visible radiation? (3 Marks) b. What is the necessary criterion for absorption to occur in the infrared region? (2 Marks) What types of molecular vibration are associated with infrared absorption? (2 Marks) [Subtotal: 35 Marks] C.
Question 3 35 Marks a. C. Na = 4 a 1+ e. 3.1 Substances A and B have retention times 8.20 and 8.815 min, respectively, on a 30.0 cm column. An unretained species passes through the column in 1.30 min. The peak withs (at base) foe A ana B are 0.555 and 0.605 min, respectively. Calculate: The column resolution (3 Marks) b. The average number of theoretical plates in the column. (2 Marks) The plate height (2 Marks) d. The length of the column required to achieve a resolution of 1.5. Note that Rs = ) and the quantities K and a do not change greatly with increasing N and L. Substitute N1 and N2 in this equation and divide. (5 Marks) The time required to elute substance B on the column that Rs value of 1.5. Note that tr = 16 R$ 11a/(a – 1))2 (4****) and the quantities K and a do not change greatly with increasing N and L. Substitute Rs1 and Rs2 in this equation and divide. (5 Marks) 3.2 The drug tolbutamine (Molar mass = 270 g/mol) has a molar absorptivity of 703 at 262 nm. One tablet is dissolved in water and diluted to a volume of 2 L. The solution exhibits an absorbance equal to 0.680 in a 1 cm cell. In which region of the electromagnetic spectrum the drug absorbs the radiation? (1 Marks) b. Calculate the transmittance and % transmittance of the drug solution. (4 Marks) Calculate the concentration of the drug solution (3 Marks) d. Calculate the mass of tolbutamine contained in the tablet. (3 Marks) a. C. a. 3.3 Spectroscopic methods are based on the interaction of electromagnetism ration with matter. What type of electrons in a molecule are generally involve in UV or visible radiation? (3 Marks) b. What is the necessary criterion for absorption to occur in the infrared region? (2 Marks) What types of molecular vibration are associated with infrared absorption? (2 Marks) [Subtotal: 35 Marks] C.