Given that the substitution reaction of toluene with Br 2 can, in principle, lead to the formation of three isomeric bromotoluene products. In practice, however, only o- and p-bromotoluene are formed in substantial amounts. The meta isomer is not formed. The structures of three possible carbocation intermediates are to be drawn and the predominance of ortho and para products over the meta product is to be explained. Concept introduction: When a monosubstituted benzene is subjected to electrophilic substitution reaction, the electrophile in principle can get substituted in any of the three positions, ortho, meta and para. Which isomer will be formed predominantly depends on the stability of the allylic intermediate formed by the attack of the electrophile on the benzene ring. The more stable intermediate will yield the products. To draw: The structures of three possible carbocation intermediates formed during the substitution reaction of toluene that leads to the formation of o-, p- and m-bromotoluenes. To explain: The observation when toluene reacts with bromine the ortho and para products are formed predominantly than the meta product.

Question

43) 10.00 ml of vinegar (active ingredient is acetic acid) is titrated to the endpoint using 19.32 ml of 0.250 M sodium hydroxide. What is the molarity of acetic acid in the vinegar? YOU MUST SHOW YOUR WORK. NOTE: MA x VA = MB x VB

Answer 1

Question

Chapter 15.SE, Problem 52AP

Interpretation Introduction

Interpretation:

Given that the substitution reaction of toluene with Br₂ can, in principle, lead to the formation of three isomeric bromotoluene products. In practice, however, only o- and p-bromotoluene are formed in substantial amounts. The meta isomer is not formed. The structures of three possible carbocation intermediates are to be drawn and the predominance of ortho and para products over the meta product is to be explained.

Concept introduction:

When a monosubstituted benzene is subjected to electrophilic substitution reaction, the electrophile in principle can get substituted in any of the three positions, ortho, meta and para. Which isomer will be formed predominantly depends on the stability of the allylic intermediate formed by the attack of the electrophile on the benzene ring. The more stable intermediate will yield the products.

To draw:

The structures of three possible carbocation intermediates formed during the substitution reaction of toluene that leads to the formation of o-, p- and m-bromotoluenes.

To explain:

The observation when toluene reacts with bromine the ortho and para products are formed predominantly than the meta product.

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43) 10.00 ml of vinegar (active ingredient is acetic acid) is titrated to the endpoint using 19.32 ml of 0.250 M sodium hydroxide. What is the molarity of acetic acid in the vinegar? YOU MUST SHOW YOUR WORK. NOTE: MA x VA = MB x VB

424 Repon Sheet Rates of Chemical Reactions : Rate and Order of 1,0, Deception B. Effect of Temperature BATH TEMPERATURE 35'c Yol of Oh نام Time 485 Buret rend ing(n) 12 194 16. 6 18 20 10 22 24 14 115 95 14738 2158235 8:26 CMS 40148 Total volume of 0, collected Barometric pressure 770-572 ml mm Hg Vapor pressure of water at bath temperature (see Appendix L) 42.2 Slope Compared with the rate found for solution 1, there is Using the ideal gas law, calculate the moles of O; collected (show calculations) times faster 10 Based on the moles of O, evolved, calculate the molar concentration of the original 3% 1,0, solution (sho calculations)

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