The primary reason for the addition of anhydrous magnesium sulfate to the organic solvent layer resulting from the extraction of an organic compound from water is to (: O a. Remove residual of water b. remove residual NaCl c. remove residual acid catalyst d. neutralize the residual NaOH e. all of the above
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- SPOT TEST OBSERVATION MATRIX Reagent K.Cro, KSCN NH,OH DMG HCI H,SO, Yellow Clear Clear precipitate No precipitate precipitate No precipitate No reaction precipitate Clear White White Pb(NO,), Orange Dark red Faint orange Clear Clear Clear Fe(NO,), precipitate No precipitate precipitate No reaction No precipitate No precipitate Clear precipitate No precipitate No reaction Yellow no Clear Pink solution Cream White Ni(NO,), solution precipitate No reaction Reddish White Faintly milky white precipitate Clear White No precipitate precipitate precipitate Clear AGNO brownish precipitate precipitate • Clear light yellow No precipitate No precipitate No reaction No precipitate solution Opaque Clear Clear Clear White Ba(NO,), precipitate Undereach reagentindicate whathappened (if anything) when mixed with the metal ion shown on the left. Write balanced reactions to representwhat happenedineach spottest.Which of the followings is the important feature for choosing a good solvent for any recrystallization? O a. The compound of interest should be soluble in the solvent at high temperatures, but insoluble at room temperatures o b. c. The compound of interest should be insoluble in the solvent at high temperatures, but soluble at room temperatures O d. The compound of interest should be soluble in the solvent at all temperatures O E. The impurities must be insoluble in the solvent at high temperaturePRELAB EXERCISE: Describe in detail the laboratory operations, reagents, and solvents you would employ to prepare. inort sc to A 144 40 & L. 8. P Y U K 6,
- Which of the following is not a feature that primary standard substances should have.A. must be of high purityB. must be of low molecular weightC. must be stable in airD. must dissolve sufficiently in titration mediumFor standard turbidity measurements, the increase in signalis due toa.) higher amounts of analytes that complex with formazin.b.) higher amounts of analytes that precipitate with formazin.c.) higher amounts of analytes that react with formazin.42. Pay attention to the formula of aloe vera extract lipbalm (Aloe vera.L): Glycerin 5% Cera flava 10% Nipagin 0.18% Lanolin 15% Oleum cacao ad 100% Aloe vera extract 10% The active ingredient in the formula is .... A. glycerinB. oleum cacaoC. aloe vera extractD. cera flava 43. The effect of using ascorbic acid in cosmetics with a concentration of 50% of the total preparation is …. A. can cause skin irritationB. provides optimal effect on skin youthC. increase ROS in the bodyD. Brighten the skin optimally
- Activity 1. Strength of IMFA and Physical Properties of berrmad suoHInW What's More Activity 1. Strength of IMFA and Physical Properties of d Covalent Compounds For each pair of molecules, identify the one with the higher boiling point (BP), melting soint (MP), viscosity (V), surface tension (ST) and vapor pressure (VP). Briefly explain rour choice. BP MP V ST VP H-C-H CI-C--CI H. :CI Methane, CH4 carbon tetrachloride, CC14 H. H. Dihydrogen sulfide, H2S water, H20 H-C-ö-H H-C-C-ö-H H. H. ethanol, CH3CH:OH Methanol, CH;OH H :O H. H. H-C-C=ÖH H-C-C- C--H Acetic acid, CH3COOH acetone, CH3OCH, Adapted from Punzalan and Monserat (2016) 10Rearrange the following sentences 1) Isolation and separation of bioactive compound 2) Characterization of bioactive compound 3) Collection, washing and drying. 4) Extraction. 5) Pharmacological evaluation, *.toxicological evaluation and clinical evaluationGraw Hill C Chegg- Get OWLv2 | Ass Submit Answer MOTION EYE Blackboard! Content ast.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take g/L OWLv2 | (X CengageNO [Review Topics] [References] Use the References to access important values if needed for this question. What is the solubility of nitrogen (in units of grams per liter) in water at 25 °C, when the N₂ gas over the solution has a partial pressure of 0.274 atm? kH for N₂ at 25 °C is 6.47x 10-4 mol/L'atm. New Tab Retry Entire Group 4 more group attempts remaining D ot
- What's More Activity 1. Strength of IMFA and Physical Properties of Covalent Compounds Ror each pair of molecules, identify the one with the higher boiling point (BP), melting noint (MP), viscosity (V), surface tension (ST) and vapor pressure (VP). Briefly explain your choice. BP MP LS H--H H. Methane, CH4 carbon tetrachloride, CC14 S. Dihydrogen sulfide, H2S H. H water, H2O H-0-5-H H-C-C-Ö-H H. Methanol, CH3OH H ethanol, CH3CH2OH H. H. H-C-C=ÖH H-C-C-C-H H. Acetic acid, CH,COOH H. acetone, CH,OCH3 Adapted from Punzalan and Monserat (2016)Hi pls help me with this with solution and explanation thanks! This is GenchemThe above solution was wrong when entered into homework site