I'm enthusiastic because I love the wonder of chemistry, but I'm patient and understanding because I remember the drudgery of A-level. I'm compassionate and friendly as a tutor because that's what it takes to bridge the gap between the two.
Ultimately, you decide what we cover in our sessions. However, I offer a range of lesson formats. In addition to complete tutelage in a whole curriculum for A-level chemistry, I'm happy to give a short crash course to improve confidence, have your questions answered to iron out the details, or cover preparatory material to get ahead of the competition before A-level year.
|Chemistry||A Level||£22 /hr|
|Before 12pm||12pm - 5pm||After 5pm|
Please get in touch for more detailed availability
Sarah (Parent) November 3 2016
Sarah (Parent) July 28 2016
Sarah (Parent) February 9 2017
Sarah (Parent) February 2 2017
There are a few things to learn about the use of curly arrows. Once you've grasped the basics, though, you'll be able to use them with simplicity and clarity no matter how complicated the mechanism is!
The first thing to remember is that the arrow should start on something which represents a pair of electrons. This is most commonly either a lone pair of electrons, or a filled π orbital in a double bond. This is to say that the arrow starts off where the electrons start off.
The second thing is that the arrow-head should point to the place where the electrons are going. If the electrons are forming a new bond, they will be shared between two atoms, and so the arrow-head should point between the two atoms. In short, the arrow ends up where the electrons end up.
As with any other concept in chemistry, the best strategy to master curly arrows is practice! Always remember that clarity is key when composing a mechanism, so draw the structure which best avoids confusion.see more