Unit 3.5 I can recall the reaction of methane and bromine to form bromomethane in the presence of UV light

·         Alkanes react with bromine in the presence of UV light

·         Explain why this condition is necessary because the UV light is required for the energy to break the bonds between carbon and hydrogen

3.       What is this type of reaction called A substitution reaction

4.       State and explain the observations The bromine and methane mixture goes from brown to a colour-less gas, because Bromine is brown whereas when reacted, the product (Bromomethane and Hydrogen Bromide) are colourless, therefore the resulting solution is colourless.

5.       Draw the displayed formula of the reaction between methane and bromine (upload a photo)

6.       Write out a balanced (with state symbols) the reaction between ethane and chlorine

C2H6 (g) + Cl2 (g) --> C2H5cl (g) + HCl (g)

7.       State and explain the observations in this chemical reaction

From a yellow gas to a colourless gas