. Compute for the volume of denatured ethanol needed to prepare 25 mL of 3% (vol/vol) solution. Note that the concentration of the denatured alcohol stock solution is 98%. · Explain in detail how the solution will be prepared in the laboratory.
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Preparation of 3% (vol/vol) Alcohol Solution
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- Molecule Type Boiling point (°C) CH3CH2CH3 Alkane -42 CH3CHO Aldehyde +21 CH3CH2OH Alcohol +78 i. Why is the boiling point of the aldehyde greater than that of the alkane?ii. Why is the boiling point of alcohol the highest?iii. Explain why the solubility of aldehydes and alcohols falls as the molecules get bigger.Normal boiling point of ethanol (C2H5OH) is 78 °C, and of propanol (C3H7OH) is 97 °C. a. Explain the reason for the difference in boiling points of these two alcohols. b. When the underline methyl group in propanol, CH3CH2CH2OH, is replaced with a hydroxyl group (HOCH2CH2OH), boiling point of the molecule increases to 197 °C. Explain the reason for observed increase in the boiling point.Why is methanol chosen as the solvent for recrystallization? A. Because it can easily be boiled off. B. Because the product and the impurities dissolve well at the boiling point of the solvent. C.Because the reactants dissolves less than the product in methanol at low temperatures. D.Because it has a low boiling point
- 2.how much water should be added to 100ml of 95% ethanol to make 50%rthanol?1. What boiling point of the following mixture of compounds. Then, which would boil first? And Finally, indicate what type of distillation will you use to separate them.The dose makes the poison. Calculate the total volume of pure ethanol in just one Ethanol is highly toxic if it is consumed in large quantities. 23.5 fl. oz. (695 mL) can of American malt liquor, which is 12% volume per volume (v/v) ethanol. Although it is the second least toxic of the five alcohols discussed in this case, the ingestion of large quantities of Enter your answer in milliliters. ethanol is not safe. One serious problem with ethanol consumption is how the quantity is conveyed to the consumer. For example, American malt liquor can be sold pure ethanol: mL in 23.5 fl. oz. (695 mL) cans and is 12% volume per volume (v/v) ethanol. Although these cans are labeled as containing multiple servings, many young people consider one can to be a single serving. Drinking two cans of this beverage can result in an accidental overdose of ethanol. Two cans may not seem like much until you do the math.
- 1. Consider the solubility and boiling point of the following pair of compounds: n-butyl alcohol and diethyl ether. The boiling points for the compounds are 118 °C and 35 °C respectively. The solubility for both compounds is the same (8g/100g water). Explain this observation for (i) boiling point disparity; (ii) solubility similarity a. H-bonds form in diethyl ether; n-butyl alcohol forms H-bonds in water b. H-bonds form in n-butyl alcohol; diethyl ether forms H-bonds in water c. H-bonds in n-butyl alcohol; Both compounds form H-bonds in water d. Both compounds form H-bonds; Both compounds form H-bonds in water 2. Account for the bond angle differences between (i) H-C-H (109.5°) in methane and H-S-H (90°); H-C-H (109.5°) and H-O-H (107.5°) in water. a. The H-S-H has two lone pairs; The H-O-H has two lone pairs b. The H-S-H has no hybridization at p-orbitals; The H-O-H has two lone pairs c. The H-S-H has two lone pairs; The H-O-H has no hybridization…Arrange the following alcohols in increasing solubility in water ethanol 1-pentanol 1-propanol 1-hexanol a. I < II < III < IV b. IV < II < III < I c. IV > II > III > I d. I > II> III > IVDefine Solubility of Alcohols ?
- 1. Enumerate and discuss the unique properties of water. Give examples for each.2. Water is the so-called universal solvent. Give everyday examples of these aqueoussolutions.3. How would you able to increase the degree of saturation of a sugar solution?If 0.90g of ethyl alcohol in the vapor state occupies 200ml at a pressure of 6atm and a temperature of 100C, what is the molecular weight of ethyl alcohol? Oa) 22.978g/mole Ob) 0.0229g/mole Oc) 45.6g/mole Od) 2.32g/mole7. Draw a circle around the compound in each horizontal row with the greatest water solubility and draw a rectangle around the compound with the lowest solubility in water. 1-pentanol 1-hexanol 1-octanol methanol OH Но OH Но НО 8. Classify the alcohols below as 1° or 2º or 3º. OH HO HO OH