Ethers (general formula ROR) have many important uses. Until recently, methyl tert-butyl

Chapter 15, Problem 15.105

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Ethers (general formula ROR) have many important uses. Until recently, methyl tert-butyl ether (MTBE, right) was used as an octane booster and fuel additive for gasoline. It increases the oxygen content of the fuel, which reduces CO emissions. MTBE is synthesized by the catalyzed reaction of 2-methylpropene with methanol. (a) Write a balanced equation for the synthesis of MTBE. (Hint: Alcohols add to alkenes similarly to the way water does.) (b) If the government required that auto fuel mixtures contain 2.7% oxygen by mass to reduce CO emissions, how many grams of MTBE would have to be added to each 100. g of gasoline? (c) How many liters of MTBE would be in each liter of fuel mixture? (The density of both gasoline and MTBE is 0.740 g/mL.) (d) How many liters of air (21% O2 by volume) are needed at 24_C and 1.00 atm to fully combust 1.00 L of MTBE?

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