Alkenes a levelWatch this thread
elliot rintoul for AQA or machemguy if you do OCR, go through the alkenes section in the specification and cross things off as you learn them, e.g the diff organic reactions, testing for an alkene using bromine water, etc. Draw out mechanisms again and again till you remember them !! if your textbook sucks at explaining it you could try looking in a CGP revision guide or even just asking a friend to run through the topic with you
a mechanism essentially shows the steps that occur when a reaction is taking place – where electrons move, and the order in which bonds are broken and formed.
you start with the reactants, use a "curly arrow" to show where a pair of electrons is moving to – you make bonds and break bonds. in reactions with multiple steps (most reactions) you'll have an (or multiple is there are many steps) "intermediate", and eventually you get to the product
I really don't understand the content for alkenes and have a test on Monday could anyone give some advice. I can't even find any good videos on YouTube and I don't think my teacher would sit there and teach me the topic again.
I can recommend you a number of resources that you can access! Here is a link to free revision notes and free past papers which are seperated by topics. You can go over them and then look at the mark schemes and see how different your answer is and take a note of how you can improve your answer to score maximum points! As well as this, here is a link to a Youtube channel that goes over the chemistry material such as alkenes. If it helps, we also offer A-Level Chemistry Online course that could help you understand the material better!
Hope this helps and good luck!
thank you so much everyone. Just a quick question for the mechanisms for example the halogenation of alkenes do I only need to know how to do it or do I have to be able to explain what happens. Like do I need to know that the pi bond interacts with the electrons in Br-Br bond causes it to be polarised etc.?