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- What is the purpose of including a melting point in a procedure? A) As a method of purification - We can purify a substance. B) As a method of encouraging synthesis - Reagents are always more reactive in the liquid state. C) As a method of encouraging a substance to dissolve - Free molecules in the liquid state can make interactions and dissolve in the solvent easier. D) As a method of characterization We can identify an unknown substance. -- O A OD4. Suppose you have a mixture of saturated aqueous sodium chloride (brine) and your 2-bromo-2-methylbutane product in a separatory funnel. Use densities to predict which phase will be the top layer in the funnel. a. 2-bromo-2-methylbutane (organic phase) b. saturated sodium chloride (aqueous phase) c. hard to predict since densities are both very close to 1.18 g/mL d. there would only be one phase since the substances are miscible7. Why is water a suitable solvent for this recrystallisation? 8. Calculate the concentration in mol dm-3 of 10 w/v% sodium hydroxide. 9. Write down an organic chemistry mechanism (use curly arrows) for the transformation of benzamide to benzoic acid, via its sodium salt.
- 35-38. Ethanol is freely soluble in water, but ethane is insoluble. Using principles of Нн Н-С-С-н Н-С-С-О: нн intermolecular forces describe... 35. ...what is needed for a solute to dissolve in a solvent. нн ннн ethane ethanol 35. ...why ethanol dissolves in water. 36. . why ethane does not dissolve in water. ... 38. Draw the IMF that is formed between water and ethanol.You have learned three different types of distillation (simple, fractional, steam). For each case below, explain which type of distillation would be most efficient in terms of time and separation. A. Separating 1-butanol from its constitutional isomer 2-butanol B. Separating limonene from lemon peel C. Separating ethanol from ethylene glycol1. Alcohols X and Y formed layers with Lucas reagent. Compound X formed brown precipitate with KMnO4 while compound Y did not. Which are the possible identities of compounds X and Y? a.tert-butanol, propanol b.isopropanol, isopentyl alcoholc. methanol, ethanold.tert-butanol, isopropanol2. Alcohols that cannot be distinguished using the Lucas test? a.isopropanol and methanol b.t-butyl alcohol and ethanol c.t-butyl alcohol and 2-methylbenzyl alcohol d.ethanol and n-propanol
- IDENTIFICATION OF THE COMPONENTS OF THE MIXTURES. 1. A. Sodium Chloride - naphthalene -'Food Color Mixture 1. Sublimation 2. Adsorption with activated carbon 3. Dissolution with water then evaporation B. Sodium chloride - Sulfur - Sand Mixture 1. Dissolution with water then evaporation 2. Dissolution with toluene then decantation 3. Dissolution with toluene the evaporation4. Sublimation can be employed as a purification technique for substances that have Short answer text 5. Having known that phthalic anhydride readily sublimes, what two separation techniques will allow the separation of the the components in a mixture containing phthalic anhydride, benzoic acid and sodium chloride?1. What type of reaction explains solubility of phenol in sodium hydroxide? Explain the organic product formed. 2. How do the reactions of phenol samples with FeCl3 compare? Which structural component of the phenols account for the observation
- 6. Sodium chloride, β-D-fructofuranosyl α-D-glucopyranoside or sodium chloride - β-Dfructofuranosyl α-D-glucopyranoside solutions are used for dehydration of pumpkin.a) Estimate the water activity of 30% β-D-fructofuranosyl α-D-glucopyranoside solution.b) Estimate the water activity of 30% sodium chloride solution.c) Estimate the water activity of solution 20% sodium chloride and 20% β-Dfructofuranosyl α-D-glucopyranoside solution.d) What do you think about the effectivity of these solutions if the water activity of pumpkins are 0.945?Please answer the question at the bottom, Thanks. LAB NOTES FOR PREPARATION OF BUTYL MAGNESIUM BROMIDEAND ITS SUBSEQUENT CONVERSION TO AN ALCOHOL To the reaction flask were added 2.5967 gram of magnesium turnings, about 20 mlof diglyme, and a solution of 13.5942 gram of butyl bromide in about 25 mldiglyme.The procedure as per the lab manual was initiated. After the required heating timewas completed the reaction mixture was allowed to cool to room temperature.Then a solution of 6.1123 gram of acetone in about 15 ml of diglyme was addeddropwise as per the lab manual.The rest of the lab manual procedure was completed, ultimately affording 2.5532gram of an oily, clear and slightly yellow liquid, presumed to be 2-methyl-2-hexanol. Boiling point as measured by distillation was 138 – 141 deg C.About 0.8 ml of the presumed 2-methyl-2-hexanol was placed in an NMR tube towhich was added 2 drops of TMS. The tube was capped, then inverted and righted20 times to thoroughly mix the product and…Please answer the question at the bottom, Thanks. LAB NOTES FOR PREPARATION OF BUTYL MAGNESIUM BROMIDEAND ITS SUBSEQUENT CONVERSION TO AN ALCOHOL To the reaction flask were added 2.5967 gram of magnesium turnings, about 20 mlof diglyme, and a solution of 13.5942 gram of butyl bromide in about 25 mldiglyme.The procedure as per the lab manual was initiated. After the required heating timewas completed the reaction mixture was allowed to cool to room temperature.Then a solution of 6.1123 gram of acetone in about 15 ml of diglyme was addeddropwise as per the lab manual.The rest of the lab manual procedure was completed, ultimately affording 2.5532gram of an oily, clear and slightly yellow liquid, presumed to be 2-methyl-2-hexanol. Boiling point as measured by distillation was 138 – 141 deg C.About 0.8 ml of the presumed 2-methyl-2-hexanol was placed in an NMR tube towhich was added 2 drops of TMS. The tube was capped, then inverted and righted20 times to thoroughly mix the product and…