The objective is to find the molarity of KSCN solution obtained by dissolving 0.440 g of KSCN in enough water to make 340. mL of solution. Concept Introduction: Molarity of a solution is defined as the amount of solute dissolve in 1 L of solution. It is mathematically represented as follows: M = n V Here, n is number of moles of solute and v is volume of solution is L. Also, number of moles are related to mass and molar mass as follows: n = m M Here, m is mass and m is molar mass.

Question

1,4-Dimethyl-1,3-cyclohexadiene can undergo 1,2- or 1,4-addition with hydrogen halides. (a) 1,2-Addition i. Draw the carbocation intermediate(s) formed during the 1,2-addition of hydrobromic acid to 1,4-dimethyl-1,3-cyclohexadiene. ii. What is the major 1,2-addition product formed during the reaction in (i)? (b) 1,4-Addition i. Draw the carbocation intermediate(s) formed during the 1,4-addition of hydrobromic acid to 1,4-dimethyl-1,3-cyclohexadiene. ii. What is the major 1,4-addition product formed from the reaction in (i)? (c) What is the kinetic product from the reaction of one mole of hydrobromic acid with 1,4-dimethyl-1,3-cyclohexadiene? Explain your reasoning. (d) What is the thermodynamic product from the reaction of one mole of hydrobro-mic acid with 1,4-dimethyl-1,3-cyclohexadiene? Explain your reasoning. (e) What major product will result when 1,4-dimethyl-1,3-cyclohexadiene is treated with one mole of hydrobromic acid at - 78 deg * C ? Explain your reasoning.

Answer 1

Question

Chapter 6.5, Problem 6.4QC

Interpretation Introduction

Interpretation:

The objective is to find the molarity of KSCN solution obtained by dissolving 0.440 g of KSCN in enough water to make 340. mL of solution.

Concept Introduction:

Molarity of a solution is defined as the amount of solute dissolve in 1 L of solution.

It is mathematically represented as follows:

M=nV

Here, n is number of moles of solute and v is volume of solution is L.

Also, number of moles are related to mass and molar mass as follows:

n=mM

Here, m is mass and m is molar mass.

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