Degree: Physical Natural Sciences (Chemistry) (Masters) - Cambridge University
Hi, my name is Oliver. I study Natural Sciences at Cambridge, with a primary focus on Chemistry, and achieved all A* in my A levels of Maths, Chemistry and Biology.
My studies at Cambridge, in addition to many years of tutoring core maths and chemistry, have led to a high understanding of the material required for the A level and GCSE course, and I'm eager to help you understand it too.
I fully understand how the prospect of taking A levels can seem daunting, however I don't believe this has to be the case. With the right preparation, you can be much more assured in your capabilities. I believe that I can help you prepare by guiding you to make your studying not easier, but more enjoyable.
I look forward to teaching you.
|Chemistry||A Level||£22 /hr|
|Maths||A Level||£22 /hr|
Tanya (Parent) September 2 2016
Tanya (Parent) March 2 2016
Tanya (Parent) February 24 2016
Tanya (Parent) February 10 2016
The equation of a metal ion forming a metal hexaaqua ion in aqueous solution is as follows.
Mn+ + 6H2O > [M(H2O)6)]n+
These are acidic because the metal is positively charged, and so attracts electron density away from the oxygen and from the O-H bonds. The O-H bonds therefore become weaker, and are easier to break. When the O-H bond breaks, a proton is given off which means that the metal hexaaqua ion is more acidic than regular water.
Because group 3 metals form 3+ cations, and group 2 metals form 2+ cations, group 3 metals form more positive ions than group 2 metals. This means that group 3 metals attract more electron density from the O-H bonds than group 2 metals, and so the O-H bonds become even weaker. The protons are therefore released easier causing the pH to decrease further.see more