1 Why is prop-1-ene considered to be a dangerous compound?

Here are the solutions to your questions:

5.1 Why is prop-1-ene considered to be a dangerous compound?
Prop-1-ene is highly flammable, meaning it can easily ignite and burn, posing a fire hazard.

5.2 Which part of the structure of an alkene allows it to undergo addition reactions?
The carbon-carbon double bond ($C=C$) allows alkenes to undergo addition reactions.

5.3 In one type of addition reaction; prop-1-ene can be converted to an alcohol.

5.3.1 Use structural formulae to write a balanced equation for the formation of the alcohol during this addition reaction.
Prop-1-ene reacts with water to form propan-2-ol (following Markovnikov's rule).

$$\begin{align*} &\quad H \quad H \quad H \quad \quad \quad \quad \quad \quad \quad \quad H \quad OH \quad H \\ &\quad | \quad | \quad | \quad \quad \quad \quad \quad \quad \quad \quad | \quad | \quad | \\ H & - C = C - C - H \quad + \quad H - O - H \quad \longrightarrow \quad H - C - C - C - H \\ &\quad | \quad \quad | \quad \quad \quad \quad \quad \quad \quad \quad \quad | \quad \quad | \\ &\quad H \quad \quad H \quad \quad \quad \quad \quad \quad \quad \quad \quad H \quad \quad H \end{align*}$$

5.3.2 Name the type of addition reaction that takes place.

• Hydration

5.3.3 Write down the name or formula of the catalyst used in this reaction.

• Sulfuric acid ($H_2SO_4$) or Phosphoric acid ($H_3PO_4$)

5.4 Use molecular formulae to write down a balanced chemical equation for the complete combustion of propane.