Sixth form Chemistry Investigation

thestudentroom.co.uk - 2013-03-26 12:19:21 - Similar - Report/Block

Hi, I am doing an chemistry investigation (Bromate, bromide and hydrogen Ions reaction). The problem is that I have calculated the reaction rate in 1/time which gives me units s-1. However I have seen some examples of reaction equation and they include mol dm-3 s-1. In those example the table included 1/time as rate of reaction but when c...

Sixth form Chemistry Individual Investigation - Reaction of magnesium with acids

thestudentroom.co.uk - 2013-04-11 12:52:11 - Similar - Report/Block

Hi, I'm doing my investigation on the reaction of magnesium with hydrochloric acid, sulphuric acid, and Nitric acid. I need to work out why Nitric acid doesn't work very well, can anyone help me with this? or any ideas on how to extend my investigation.

Sixth form Chemistry ocr salters investigation plan

thestudentroom.co.uk - 2013-03-14 12:45:41 - Similar - Report/Block

I've been doing the ocr salters investigation on iodine clock reaction with peroxodisulfate and although ive finished it i need to make a bit better to get a few more marks. Couldsomeone please send me theirs? Thanks Harpreet...

Sixth form Working Out Non-Integer Orders of Reaction? (F336 Individual Investigation)

thestudentroom.co.uk - 2013-03-22 10:56:26 - Similar - Report/Block

Hellooo So I'm having a bit of trouble figuring out the order of reaction for an experiment I've been doing in chemistry. It's a simple Mg + HCl reaction and as part of my investigation I need to determine the rate equation with respect to Hydrochloric Acid. I've been using the initial rates method, however all the theoretical stuff I've...

Sixth form What Raw Mark = Full UMS in OCR Salters Chemistry Individual Investigation

thestudentroom.co.uk - 2013-05-10 18:55:00 - Similar - Report/Block

The last 3 years 37/45 has been an A, i.e. 72/90 ums, but usually there is a cut off point at which you get full ums, and I can't find a raw mark/ums converter anywhere Anyone know? thanks...

OCR Chemistry Salters B: Individual Investigation - Evaluation.

thestudentroom.co.uk - 2013-03-25 19:41:33 - Similar - Report/Block

I'm just about to finish up my individual investigation (which has been a nightmare) but upon writing my evaluations I can't think of very much to write about for my colorimetry procedure. If anybody could give me some evaluative points for colorimetry I'd be so grateful!...

Sixth form Iodine Clock reaction (Initial rate help)

thestudentroom.co.uk - 2013-04-11 13:56:25 - Similar - Report/Block

Can someone give me some advice on my investigation? I'm doing the Potassium Iodine clock reaction, and I need to work out the order of the reaction for the rate law. My teacher suggested I do it the way we do in advanced higher with the initial rates, the only problem is , I don't know how to work the initial rate of the reaction especia...

Sixth form chemistry ocr as practical skills assessment

thestudentroom.co.uk - 2013-03-14 00:12:54 - Similar - Report/Block

i have a chemistry ocr practical skills assessment quantitative with the sentence you will carry out an experiment to investigate reaction rates and enthalpy changes. has any one done this that could tell me what to revise and how the paper was?...

Sixth form Sodium Thiosulphate and Hydrochloric reaciton COURSEWORK

thestudentroom.co.uk - 2013-03-15 02:37:48 - Similar - Report/Block

hey guys, im doing my chem investigation and im stuck on a few things, sodium thiosulfate sodium chloride sulfur dioxide sulfur water (aq) (aq) (aq) (g) (s) (l) firstly let me tell you what im doing so we're on the same page: 1. changing the conc of Sod.Thio and keeping HCl the same 2. changing the conc of HCl and keeping Sod.Thio the sam...

Chemistry Salters B Investigation: Iodine Clock rate constant, k

thestudentroom.co.uk - 2013-04-09 12:22:28 - Similar - Report/Block

Hi,I've been doing the Iodine-Clock Reaction for my investigation, using Potassium Iodide, Sodium Thiosulphate and persuklfate, I know the order of the reaction is rate=k[I-][S2O82-] , so they're both first order. But how do I find the rate constant k? I kept the conc of one substance constant for one experiment, then changed the other an...

Sixth form Iodine Clock reaction, determining rate constant k

thestudentroom.co.uk - 2013-04-11 12:06:26 - Similar - Report/Block

Hi,I've been doing the Iodine-Clock Reaction for my Salters investigation, using Potassium Iodide, Sodium Thiosulphate and persuklfate, I know the order of the reaction is rate=k[I-][S2O82-] , so they're both first order. But how do I find the rate constant k? I kept the conc of one substance constant for one experiment, then changed the...

Sixth form Chemistry question help

thestudentroom.co.uk - 2013-05-31 19:16:47 - Similar - Report/Block

I am a bit confused on how to do these kind of questions- i know Hess' Law, and you have to find intermediates- but i am really stuck on this question : The data below can be used to calculate the enthalpy change of formation of N20. C+N20 - CO+N2 enthalpy change of reaction =-193 kJ mol^-1 C+1/2 O2 - CO enthalpy change of reaction=-111 k...

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Sixth form Effect of Temperature on the movement of maggots

thestudentroom.co.uk - 2013-03-22 01:35:14 - Similar - Report/Block

Hi there, I need help regarding the layout and the content of this individual investigation. Can someone who has done this experiment please guide me or send me copy of their draft so that I can work on those lines. Thanks and regards,...

Sixth form Chemistry Coursework: peroxodisulfate and iodide mechanism?

thestudentroom.co.uk - 2013-03-20 15:58:10 - Similar - Report/Block

For my coursework I have to work out a possible mechanism for a reaction and I have tried to find one and cant. I have checked online and cant find one and also asked my teacher but she says she isn't allowed to tell me as it's for coureswork. The two reactions are: S2O82- (aq) + 2I- (aq) -> SO42- (aq) + I2 (aq) 2S2O32- (aq) + I2 (aq) ->...

Sixth form how do you know if a reaction is an oxidation reaction?

thestudentroom.co.uk - 2013-04-20 12:37:25 - Similar - Report/Block

I got a question: suggest the type of reaction that is involved when a hydrocarbon is converted to an aldehyde. I know the answer is oxidation.. but why? This is what annoys me about my teacher. She says things and does not explain them. I need to know why!!...

Sixth form I'm not sure, is my answer right

thestudentroom.co.uk - 2013-04-09 12:36:17 - Similar - Report/Block

Cu+ + e- >Cu 0.52v Cu2+ + e- >Cu+ +0.15v Use the data to show this reaction below is likely tooccur 2Cu+ Cu2+ + Cu More positive E value means species is more likely to bereduced. Cu+ is more likely to be reduced (0.52) than Cu2+ (0.15), this occursin the reaction above, (Cu+ is reduced toCu), so this reaction is more likelyto move forwar...

Sixth form Self taught Edexcel A2 Chemistry

thestudentroom.co.uk - 2013-03-04 09:12:56 - Similar - Report/Block

Hello all! Long story short, I finished college in summer 2012. I then went on a gap year, but one of my university offers requires me to gain an A2 in Chemistry. I hold an AS in OCR Chemistry already, but my local school holds Edexcel exams. Does anyone have any revision notes, resources or anything for the two A2 examinations for Edexce...

Sixth form What is Biology A-level like?

thestudentroom.co.uk - 2013-03-23 17:50:50 - Similar - Report/Block

Saw the chemistry one and was interested in people's thoughts about Bio, and how well Chemistry would contemplate it. I have chosen biology, chemistry, maths, english lit :D...

Sixth form Plotting a rate of reaction 1/t graph - help?

thestudentroom.co.uk - 2013-04-21 15:46:20 - Similar - Report/Block

So I've got an ISA tomorrow where I am pretty sure we will be asked to plot a rate of reaction graph for the rate of reaction of the sulphur precipitate formed following the reaction between Sodium Thiosulphate and Hydrochloric acid. For some reason, graphs make me really stressed when it comes to exams so I was wondering if anyone has an...

Sixth form chemistry - standard enthalpy changes

thestudentroom.co.uk - 2013-04-09 16:58:46 - Similar - Report/Block

How would you work out the standard enthalpy change of a reaction? Thankssss...

Sixth Form chemistry calculation for A2 Chem ISA 2013

thestudentroom.co.uk - 2013-01-31 01:35:30 - Similar - Report/Block

So I have my aqa A2 chem isa on Friday and I know this type of calculation is going to come up its worth 5 marks. can anyone tell me the steps of how to work it out. Many thanks in advance. "one possible equation for the possible reaction of ammoniacal silver nitrate (Tollens reagent) with the aldehyde propanal is shown below: CH3CH2COH...

Sixth form Chemistry Unit 2 Re-sit (On top of Unit 5)

thestudentroom.co.uk - 2013-03-28 12:13:58 - Similar - Report/Block

Hi All, I asked my exams officer to enter me for Chemistry Unit 2 again, - following advice from my Chemistry tutor that I would not need to revise for it - as I'd be revising for Unit 5 (a lot of crossover). Does anyone know if this is the case? (edexcel by the way!) Thanks a lot, Haydn...

Is This Possible At All In Sixth Form

thestudentroom.co.uk - 2013-06-11 23:23:48 - Similar - Report/Block

Hey in sixth form i want to do the following subjects; Biology Chemistry Physics Sociology BTEC Level 3 Applied Science (Assignments at home ) Stats (Self Teaching) Maths and Physics Open University Degree...

Sixth form Chemistry or Physics

thestudentroom.co.uk - 2013-04-22 18:03:33 - Similar - Report/Block

Currently im debating whether i should study chemistry at a level or physics. The a levels i have currently chosen are: Maths, Further Maths, Economics and Chemistry. Help? Posted from TSR Mobile...

Sixth form Trying to get my school to do National Higher Applied Chemistry

thestudentroom.co.uk - 2013-03-22 17:38:16 - Similar - Report/Block

Hey, I am in year 11 moving into sixth form next year and i really want to do BTEC National Higher Level 4 Applied Chemistry but the school don't currently offer it. How would i convince the science department to let me do it and the school?...

Sixth form F336 Chemistry A2

thestudentroom.co.uk - 2013-04-22 17:33:00 - Similar - Report/Block

Hi, my investigation is Acid-base Titrations. I just need clear understanding about when to 'End' my titration. my goal is to achieve a full pH graph with a shape of an 'S'. Am i supposed to stop when indicator changes colour? I'm thinking that if i end it when it the indicator changes then i'm going to have a graph that end at the equiva...

Sixth form sodium thiosulfate + HCL ISA

thestudentroom.co.uk - 2013-03-23 16:52:36 - Similar - Report/Block

OK so from what I believe the basic areas that need to be studied is chapter 7 and 12 (this is aqa so don't worry if this doesn't make sense) In addition to this rates of reaction, particularly the rates in change of concentration and effects if temperature in a reaction need to be revised. Graphs and their shapes also need to be revised...

Sixth form AS Chemistry Kinetics ISA

thestudentroom.co.uk - 2013-03-26 12:30:13 - Similar - Report/Block

Hey Guys, I was just wondering if anyone has any tips for the Chemistry Kinetics ISA (I think its unit 3t or something). I wasnt quite sure what will be asked so am panicking a bit.... It would be great if you could help out. :) Thanks,...

Sixth form Chemistry Organic A2 isa help

thestudentroom.co.uk - 2013-03-19 18:43:12 - Similar - Report/Block

I have my chemistry a2 isa coming up in a week and I have been told almost nothing about what it is on. All I was told about was that it was on organic chemistry and that I should revise organic chemistry. Can any one help me out? Please pm me Thanks anyway :D:(:p...

Sixth form Official AQA AS Chemistry Unit 1 - 23Rd May 2013

thestudentroom.co.uk - 2013-05-21 18:08:59 - Similar - Report/Block

Hi Everyone, Thought I'd create a thread for everyone to discuss about the chemistry exam this week. Any predictions, revision tips and help can be posted here! Good luck everyone!!...

Sixth form Reaction force

thestudentroom.co.uk - 2013-06-08 18:40:25 - Similar - Report/Block

Something im not understanding, can the reaction force be resolved, because say we have a plane inclined to 60 degrees to the horizontal and a particle of 70g weight is on the plane, then the angles can be made so that Rcos60 =70g or R=70gcos60 though apparently the second one is correct. If we solved for R from 1 R=1372N, from 2 R=343N,...

Sixth form m2 reaction force at hinge

thestudentroom.co.uk - 2013-04-08 23:21:17 - Similar - Report/Block

I'm some moment questions they ask you to find the reaction force at a hinge, what does that mean? As far as I know, a reaction force is an object applying an equal and opposite force on another object.

Sixth form OCR exam entry

thestudentroom.co.uk - 2013-03-20 17:44:44 - Similar - Report/Block

Hi guys im doing OCR chemistry A as level and was wondering what is the very latest date that you can be entered into an exam for a resit is? as I got a high B and my chemistry teacher said I could pull it up to an A in the ISA and I didn't (got the result today) thanks...

Sixth form what is every mechanism you need to know for chemistry unit 2 a level aqa

thestudentroom.co.uk - 2013-05-10 18:56:48 - Similar - Report/Block

can you give me a list and drawing of every mechanisms I need to learn, which may come up in the exam, for a level aqa chemistry.:) Thank You In Advance :)...

Sixth form Activation energy

thestudentroom.co.uk - 2013-04-20 06:03:26 - Similar - Report/Block

How do we know a reaction has high activation energy provided an equation? For example, C(diamond) to C(graphite). Exothermic reaction -3kJmol^-1.

Sixth Form June 2012 Mark Schemes Chemistry

thestudentroom.co.uk - 2012-08-25 14:20:06 - Similar - Report/Block

Hi, could some really kind person person please give the official OCR Mark Scheme for JUNE 2012 paper: F321 Chemistry: Atoms Bonds F322 Chemistry Chains Will give 1000+ repssss please need URGENTLY...

Best sixth form collage

thestudentroom.co.uk - 2012-09-11 17:50:36 - Similar - Report/Block

which would be the best state sixth form collage in london because im in year 11 and my teachers are saying to think about sixth form collages but i dont want to go to my schools sixth form ps how many subjects can you take in A level...

Sixth form Biology & Chemistry A level help!

thestudentroom.co.uk - 2013-03-26 12:07:13 - Similar - Report/Block

hi guys, i was just wondering if anyone currently doing chemistry and biology at a level could just give me a brief description of what its like, what you do and how you find it. I know this may be a bit tedious, but i would really appreciate it. I hope to study medicine so any help or advice would be awesome. thanks x...

Sixth form Physics, Chemistry, Biology. Which one is your favourite?

thestudentroom.co.uk - 2013-03-05 10:00:06 - Similar - Report/Block

I'm interested to see everyone's different opinions on the subjects. My favs chemistry hand down. its just so interesting...Physics is a nice challenge, but biology has waay too much memorisation. Com Sci is the worst. Can't understand that c**p at all...

Sixth form OCR chemistry-Molecular shapes?!

thestudentroom.co.uk - 2013-03-23 18:10:38 - Similar - Report/Block

Is anyone else doing OCR chemistry? What list of molecular shapes we do need to know? The book is not clear at all! :confused: Any help would be greatly appreciated!!...


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