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- Which combination cannot be used as mobile phase in RPLC? A. Acetonitrile-cyclopentane B. Water-acetonitrile C. Acetonitrile-THF D. Water-THFWhich combination cannot be used as mobile phase in RPLC? A. Water-acetonitrile B. Acetonitrile-cyclopentane C. water-THF (tetrahydrofuran) D. Acetonitrile-THF (tetrahydrofuran)Why acetone has les retention time and toluene has more. discus about polarity of 3 samples and interaction with stationary phase
- Show in a detailed manner. 1. Draw and label the set-up for melting point determination using capillary tube. 2. Differentiate melting point and melting point range.Silica gel is very polar stationary phase. Therefore, more polar molecule sticks to silica gel on the TLC plate and has higherRfvalue. True FalseWhat is done if the solid contains a colored impurity? Know the proper funnels and equipment to use. What is done if a solid impurity remains after your desired compound is dissolved in asolvent? When do you read the temperature to determine the boiling point of a liquid whendoing microscale boiling point determination
- please explain the solid solution to me completely and comprehensively. preferably with shape and picture (preferably in plain language if its not its ok) thank.Compound A is impure and has a melting point of 90°C - 98°C. After purification, A will most likely have a melting point of: *What is an azeotropic mixture? Can they be separated using simple or fractional distillation? Can you explain why for each simple and fractional distillation? Detailed explanation please!
- When should we stop collecting distillate in ethanol-alcohol simple distillation process? Give me resources/links to validate the answer.Please help Will provide helpful ratings for attempting all three mcqs. Thank uRefer to the following isolated scenarios during a UV/Vis experimental study on the acetic acid—m- xylene binary liquid-vapor equilibrium. While preparing/analyzing a mixture: m-xylene was contaminated with benzene, a more volatile substance with similar λmax. Vial used to prepare the mixture had traces of benzoic acid crystals. Cotton balls were wet with 10 drops of pure toluene instead of eight. When looking up data from the handbook, P* for p-xylene was mistakenly recorded instead of m-xylene. The recorded temperature was 25 °C but due to an undocumented AC failure, fell to 22 °C during the experiment. Acetic acid was contaminated with water. m-xylene was contaminated with ethylene, a very volatile substance with a single absorbance peak around 180 nm. Which individual scenarios would result in LOWER calculated experimental Ptotal values for the mixture? A. 1, 3, and 5 B. 3, 5, and 7 C. 2, 3, 4, and 5 D. 2, 5, 6, and 7