What is the major disadvantage of using concentrated sulfuric acid (or hydrochloric acid) rather...
85% phosphoric acid for the dehydration of alcohols?
Homework Answers
Concentrated HCl doesn't work for dehydrations in most cases, because it is not thermodynamically favored. Whereas that sulfuric and phosphoric reactexothermically with the water product, driving the reaction to completion.
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What is the major disadvantage of using concentrated sulfuric acid (or hydrochloric acid) rather...
2. a. Both concentrated sulfuric acid and concentrated phosphoric acid are known to catalyze the conversion...
2. a. Both concentrated sulfuric acid and concentrated phosphoric acid are known to catalyze the conversion of cyclohexanol to cyclohexene via dehydration reaction. Concentrated hydrochloric acid, however, is not a viable option. Provide two reasons on what make sulfuric acid and phosphoric acid advantageous over hydrochloric acid. Look up additional information on these acids if needed. b. In preparation of the bromohydrin (trans-2-bromo-1-methylcyclohexanol) with bromine, side products dibromides shown below are often observed. This side reaction can be essentially avoided...
One of the major uses of sulfuric acid is the production of phosphoric acid and calcium...
One of the major uses of sulfuric acid is the production of phosphoric acid and calcium sulfate. The reaction is: Ca3(PO4)2(s) + 3H2SO4(aq) → 3CaSO4(s) + 2H3PO4(aq) What mass of concentrated sulfuric acid (98.0 % H2SO4 by mass) must be used to react completely with 155.9 g of Ca3(PO4)2?
Typically, strong acids, like sulfuric acid, are used as an acid-catalyst for dehydration reactions of alcohols....
Typically, strong acids, like sulfuric acid, are used as an acid-catalyst for dehydration reactions of alcohols. What limitations/hazards does sulfuric acid pose in comparison to phosphoric acid? (select all that might apply) Extremely reactive Flammable Oxidizer Highly corrosive Odorous (smelly)
2. Why do tertiary alcohols react faster with concentrated hydrochloric acid than do secondary or primary...
2. Why do tertiary alcohols react faster with concentrated hydrochloric acid than do secondary or primary alcohols? 3. Why are rearrangements rare with tertiary alcohols but not with sec- ondary or primary alcohols?
Why would concentrated hydrochloric acid be an inappropriate catalyst for the dehydration of cyclohexanol?
Why would concentrated hydrochloric acid be an inappropriate catalyst for the dehydration of cyclohexanol?
A) What products would be expected if 1-butanol were heated with concentrated sulfuric acid? By which...
A) What products would be expected if 1-butanol were heated with concentrated sulfuric acid? By which mechanism would each product be formed? B) What product(s) would be expected if (r)-2-butanol were heated with concentrated hydobromic acid? If more than one product is expected, what will be the major product?
Sulfuric acid is generally sold as a concentrated solution that is 98.7% (by mass) sulfuric acid...
Sulfuric acid is generally sold as a concentrated solution that is 98.7% (by mass) sulfuric acid in water and has a density of 1.84 g/mL. What is the concentration (in M) of the commercially available concentrated sulfuric acid as described above?
Why does the pinacol rearrangement often use sulfuric acid, H2SO4, as the acid catalyst rather than...
Why does the pinacol rearrangement often use sulfuric acid, H2SO4, as the acid catalyst rather than hydrochloric acid, HCl? A. Only acids with more than one proton can catalyze the pinacol rearrangement. B. hydrochloric acid is too small to effectively react with the diol in the reaction C. Hydrochloric acid cannot create a water leaving group in the first step D. the presence of the chloride ion could result in a competing substitution reaction
What is Zaitsev’s rule? Give the mechanism for the acid-catalyzed E1 reaction of 2-butanol. Give the...
What is Zaitsev’s rule? Give the mechanism for the acid-catalyzed E1 reaction of 2-butanol. Give the mechanism for the base-catalyzed E2 reaction of 2-bromobutane. Draw all possible products. You expect three products from the elimination reaction 2-butanol. What are they? The E2 mechanism is a one-step mechanism. True or False? Explain. Which of these two alcohols would you expect to be more reactive under H3PO4/aqueous conditions? Why? Give the structure of the main product in both cases. 1-phenyl-1-propanol 1 -cyclohexyl-1-propanol...
why would concentrated hydrochloric acid be a poor choice as the acid catalyst the too informatjon...
why would concentrated hydrochloric acid be a poor choice as
the acid catalyst
the
too informatjon was not supposed to be there
[References) Draw the major product(s) of the following reactions including stereochemistry when it is appropriate (CH3)2CHCH2-CEC-H . 1 Br2 • Consider E/Z stereochemistry of alkenes. If there is more than one major product possible, draw all of them. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right comer. • Separate multiple...
2. a. Both concentrated sulfuric acid and concentrated phosphoric acid are known to catalyze the conversion of cyclohexanol to cyclohexene via dehydration reaction. Concentrated hydrochloric acid, however, is not a viable option. Provide two reasons on what make sulfuric acid and phosphoric acid advantageous over hydrochloric acid. Look up additional information on these acids if needed. b. In preparation of the bromohydrin (trans-2-bromo-1-methylcyclohexanol) with bromine, side products dibromides shown below are often observed. This side reaction can be essentially avoided...
Typically, strong acids, like sulfuric acid, are used as an acid-catalyst for dehydration reactions of alcohols. What limitations/hazards does sulfuric acid pose in comparison to phosphoric acid? (select all that might apply) Extremely reactive Flammable Oxidizer Highly corrosive Odorous (smelly)
2. Why do tertiary alcohols react faster with concentrated hydrochloric acid than do secondary or primary alcohols? 3. Why are rearrangements rare with tertiary alcohols but not with sec- ondary or primary alcohols?
why would concentrated hydrochloric acid be a poor choice as
the acid catalyst
the
too informatjon was not supposed to be there
[References) Draw the major product(s) of the following reactions including stereochemistry when it is appropriate (CH3)2CHCH2-CEC-H . 1 Br2 • Consider E/Z stereochemistry of alkenes. If there is more than one major product possible, draw all of them. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right comer. • Separate multiple...
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