I also use the George Facer book....had it last year though I felt as if my teacher was trying to punish me so i never used it
However we weren't given the black book this year so had to use the facer book and soon I grew to love it....does everything in the specification and more.
Wish i knew where i could find the god-damn answers to the questions though thats the only problem
I also use the George Facer book....had it last year though I felt as if my teacher was trying to punish me so i never used it
However we weren't given the black book this year so had to use the facer book and soon I grew to love it....does everything in the specification and more.
Wish i knew where i could find the god-damn answers to the questions though thats the only problem
I need to do some Rates of Reactions revision. Haven't looked at that in a while...
I've been doing those loads of times so I'm comfortable with them
I think I need to work on drawing the ph graph for bases and acids in the context of the question. Also, I need to work on nmr, HPLC, GC- i detest those
Guys any thing to help with memorising all the organic reactions + conditions.. theres soo much and I can't seem to get it all in my head
There isn't much on organic in Unit 4 tbh. Just go through the organic chapter making notes on the reactions (no additional info) and just go over it all until you remember it. Then practice with past papers.
v) On the axes below, sketch the titration curve for this reaction when 30 cm^3 of the NaOH is added to 25cm^3 of the vinegar solution.
Well, you know a strong base is being added to a weak acid. You should know the general shape for all 4 types of titration curves. You have already worked out the pH of the acid, so you have your starting point. You know that there is 5cm^3 more of the base being added so it's going to finish strongly alkaline (high pH). The equivalence point is at 12.5cm^3 so that is where you draw the vertical part of the graph.
Well, you know a strong base is being added to a weak acid. You should know the general shape for all 4 types of titration curves. You have already worked out the pH of the acid, so you have your starting point. You know that there is 5cm^3 more of the base being added so it's going to finish strongly alkaline (high pH). The equivalence point is at 12.5cm^3 so that is where you draw the vertical part of the graph.
I see, so to get 12.5, you just divide 25cm^3 by 2 why not the 30cm^3