Lawrie Ryan and Roger Norris Solutions for Chapter: Hydrocarbons, Exercise 13: EXAM-STYLE QUESTIONS

$2.80 \mathrm{g}$ of ethene reacts with chlorine, $8.91 \mathrm{g}$ of dichloroethane is formed. (${\mathrm{A}}_{\mathrm{r}}$ values: $\mathrm{H}=1.0, \mathrm{C}=12.0, \mathrm{Cl}=35.5$). Calculate the number of moles of dichloroethane that were formed.

$2.80 \mathrm{g}$ of ethene reacts with chlorine, $8.91 \mathrm{g}$ of dichloroethane is formed. (${\mathrm{A}}_{\mathrm{r}}$ values: $\mathrm{H}=1.0, \mathrm{C}=12.0, \mathrm{Cl}=35.5$). Calculate the percentage yield.

$2.80 \mathrm{g}$ of ethene reacts with chlorine, $8.91 \mathrm{g}$ of dichloroethane is formed. (${\mathrm{A}}_{\mathrm{r}}$ values: $\mathrm{H}=1.0, \mathrm{C}=12.0, \mathrm{Cl}=35.5$). Calculate the number of grams of dichloroethane that would have formed if the percentage yield had been $80.0\%$.

Give two effects that a hot, concentrated solution of acidified potassium manganate($\mathrm{VII}$) have on an alkene molecule.

State how the reaction of alkenes with hot, concentrated acidified potassium manganate($\mathrm{VII}$) is useful to chemists?

An alkene is known to be either But-$1$-ene or But-$2$-ene. When heated with concentrated acidified potassium mangante($\mathrm{VII}$) solution, bubbles of carbon dioxide gas were given off. Name the alkene.

Pent-$2$-ene is heated with concentrated acidified potassium manganate($\mathrm{VII}$) solution. Draw the displayed formulae of the products and name them. 

Write a balanced equation for the reaction of Pent-$2$-ene heated with concentrated acidified potassium manganate($\mathrm{VII}$) solution, using $\left[\mathrm{O}\right]$ to show oxygen atoms involved.