CHEEMistry!!!

Welcome back to school!!

2009-01-15T00:40:00.000-08:00

Hello dearest J2s! Welcome back to school! I hope many of you had enjoyed your well deserved break before coming back to school. How did you all spend you hols? I hope it was fun and fufilling cos it's going to be real hectic soon!Let us just do a quick overview of how the term will be like and what will be covered...Term 1alkanesalkeneshalogen derivativeshydroxy compoundscarbonyl

Happy Holidays

2008-10-28T09:22:00.000-07:00

Meet the parent was held on the 25th October 2008. Many parents came to ask about how all of you have done in class and how you have fared in general. We do hope that the feedback, either positive or negative will help you in your future endeavours.For those who have done well, good job done, and keep it up! =) Meanwhile you may wish to start reading up on your J2 topics??For those who have not

H2 Chemistry Promotion Examination 2008

2008-09-11T22:18:00.000-07:00

Dear JC1 students,All the topics you have learnt so far will be examined in the H2 Chemistry Promotion Examination. You should not skip any particular topic during your revision.The structure of the paper is as follows:Section A (MCQ)Section B (Structured Questions)Section C (Free Response Questions)The total mark for the paper is 100. The duration is 2.5 h. On average, you are advised to spend

JC1 H2 Chemistry SPA Skill BC

2008-04-08T22:57:00.000-07:00

Date: 16 Apr (Wed) – 22 April (Tue)Topic: StoichiometryVenue: Chem Lab1 – Chem Lab 3What to bring: · Calculator (Graphic calculator’s memory must be cleared if it is to be used)· Backup batteries for calculator· Identification (EZ card, Student Pass)· Stationery· StaplerPlease report punctually and do not bring any authorized materials (e.g. notes) into

SPA Skill BC: Stoichiometry

2008-04-07T05:05:00.000-07:00

Dear all, all the best for SPA next week.Please note that all students who miss MOCK SPA should make up the lesson this wednesday (Wed, Thu, Fri classes) or next wednesday (Mon & Tues classes). We will start at 12.30pm if there is no assembly, and 2pm if there is assembly. In the meantime, 1. Revise your SPA notes2. Re-do your Practical worksheets3. Read the titration checklist CAREFULLY4. Watch

Lecture Test 1 and JC2 SPA

2008-02-15T22:07:00.001-08:00

Dear students, please be informed that Lecture Test 1 is postponed to 28th Feb (Thurs).Topic tested: Atoms, Molecules and StoichiometryVenue: LT1Materials required: Calculator, writing paper and stationeryAlso please be reminded that the corridor outside Chem lab 4 is out of bound to students for the whole next week (week 8) due to JC2 SPA. Kindly use the staircase next to the Tennis Court in

Errata in Suggested Solution to Experiment 2

2008-01-28T20:31:00.000-08:00

Hi folks,There are mistakes in the suggested solution printed for you. Please log in to Rafflesconnect to download the corrected version.

Powerpoint Slides for practical lessons

2008-01-25T00:36:00.000-08:00

Hi Rafflesians,Please be informed that the powerpoint slides for the practical lessons held in Term 1 week 3 and week 4 will be uploaded to Raffles Connect under 7 2008/09 H2 Chemistry7-1. 2008 Term1 Practicals The suggested solutions for Experiment 1 will also be available at Raffles Connect by the end of this week. Smilez

Ah Beng Can Do Chemistry!!!!!!!

2008-01-23T06:02:00.000-08:00

WELCOME JC1s!

2008-01-07T08:58:00.000-08:00

Dear J1 Chem Student in the Class of 2009!It didn't seem like too long ago when we were welcoming your J3 seniors in a similar fashion and how quickly the two years we had with them flew by... In the blink of an eye.. you are going to be taking your A levels too, so we do hope these two years will be a meaningful one, and that you would pay due attention to the advice that we give you in the days

H2 Chemistry Paper 1 (Fri, 16 Nov 07, 1430-1530)

2007-11-15T04:23:00.000-08:00

This is a reminder to students who are sitting for H2 Chemistry Paper 1 (9746/01).Date: Friday, 16 Nov 07Time: 1430 - 1530 (1 h)Venue: Pls refer to notice boards.Format: 40 MCQs, answer ALLComments:1) Keep track of time. Every 10 questions will take you about 15 min (this is only an estimate!). If a particular question is more difficult, it is alright to spend more than 1.5 min on it. There

2007 AJC Prelims Paper 1 FAQs

2007-11-12T02:12:00.000-08:00

Explanation for Q1Amt of Cl2 molecules in 1 dm3 of air at max toleration level= (0.005 / 10^3) g / (2 x 35.5) g/molAmt of Cl2 molecules in 500 cm3 (which is 0.5 dm3) of air at max toleration level= (0.005 / 10^3) g / (2 x 35.5) g/mol x 0.5Amt of Cl atoms in 500 cm3 of air at max toleration level= (0.005 / 10^3) g / (2 x 35.5) g/mol x 0.5 x 2 (because 1 Cl2 molecule has 2 Cl atoms)No. of Cl atoms

H2 Chemistry Paper 2 (Tue, 13 Nov 07, 0800 - 0930)

2007-11-06T20:16:00.000-08:00

This is a reminder to students who are sitting for GCE A Level H2 Chemistry Paper 2.Date: 13 Nov 07 (Tue)Time: 0800 h - 0930 (Duration: 1.5 h)Venue: Please refer to notice boards.Format: Structured questions (60 marks), answer ALL--------------------------------------------------------ATTENTION:(i) Do NOT write anything on the Data Booklet.Some students scribbled on the Formula List, in PEN,

J2s, All the best for the A levels!!

2007-11-03T18:12:00.000-07:00

Chemistry Paper 3 (Mon, 5 Nov 07, 8-10am)

2007-10-31T18:47:00.001-07:00

This is a reminder for students taking GCE A Level H2 Chemistry (9746).Chemistry Paper 3Date: 5 Nov 07, MonTime: 0800 - 1000Venue: Refer to notice boardsFormat of Paper: Free Response, answer 4 out of 5 questions (80 marks)Items to Bring:Entry Proof (Not confirmation slip! Duh!)EZ Link cardGraphic / Scientific calculator (optional: extra batteries)Stationery (including curve rule)Data Booklet

2007 NJC Prelims Paper 3 FAQs

2007-10-24T22:58:00.000-07:00

A Note for Q1b2 mol of OH- reacts with 1 mol of A to give a white ppt B. The thermal decomposition of B yields a white ppt C. Thus M is likely to be a Group II element.NOTE: If M = Zn, you will also get similar observations (except that the mass of B formed is NOT 0.0215 g).Explanation for Q3b(i)The pH of the solution is 2.5, so [H+] = 10^(-2.5) mol/dm3.The initial concentration of CrO42- is

2007 VJC Prelims Paper 2 FAQs

2007-10-23T18:10:00.000-07:00

Explanation for Q2cThe temperature at which Rb melts is 39.5 deg C or (273 + 39.5) K. This is the temperature at which an eqm is established between Rb(s) and Rb(l). When the two species are at eqm, delta G of fusion is zero. delta G = delta H - T x delta S. Hence, delta H = T x delta S.Use delta H from the table and substitute T = 273 + 39.5 to find delta S.When delta G is +ve (T < g =" 0" t ="

2007 TJC Prelims Paper 3 FAQs

2007-10-23T17:42:00.000-07:00

A Note for Q2eFe(III) is stabilised by CN- ligands, so it is less likely to reduce to Fe(II) in aqueous solution.Another example: [Ni(NH3)6]2+ vs [Ni(H2O)6]2+

2007 PJC Prelims Paper 3 FAQs

2007-10-23T17:28:00.000-07:00

A Note for Q3c"Do I have to memorise the colours of all transition element complexes?"The answer is NO!Only for Cr, Mn, Fe and Cu. Examples: Cr3+, CrO42-, Cr2O72-, Mn2+, MnO2, MnO4-, Fe2+, Fe3+, Cu2+, [Cu(NH3)4]2+.Explanation for Q5bNaX + H2SO4 --> NaHSO4 + HX, X = Cl, Br or IThis is NOT a redox reaction!!!SO42- does not oxidise Cl- to Cl2.SO42- + 4H+ + 2e- <--> SO2 + 2H2O, E = +0.17VCl2 + 2e- <-

2007 HCI Prelims Paper 3 FAQs

2007-10-23T17:10:00.000-07:00

Explanation for Q4b(i)CrCl3.6H2O is the general formula for a series of complexes formed.The complexes can be [Cr(H2O)6]Cl3, [Cr(H2O)5(Cl)]Cl2 . H2O, etc.Ag+ ions can only precipitate AgCl with the Cl- ions that are NOT bonded to Cr(III).Explanation for Q5a(i)Imagine that you have a "half-cell" containing Fe2+ ions (in acidic medium) initially. This is connected to a standard hydrogen electrode

2007 ACJC Prelims Paper 3 FAQs

2007-10-23T16:53:00.000-07:00

A Note for Q1d(ii)Hot alkaline aqueous iodine (i.e. I2(aq), Na(OH)(aq), heat) will not distinguish the compounds because there is neither methyl ketone nor RCH(OH)CH3 after alkaline hydrolysis.Explanation for Q2a(i)M3+ + 3e- <--> M, E= x VA more positive x means that the reduction of M3+ to M is more feasible. It also implies that M3+ oxidises other substances more readily (while M3+ itself is

2007 NJC Prelims Paper 2 FAQs

2007-10-23T08:36:00.000-07:00

Explanation for 2cTotal pressure = Partial pressure of O2 + Partial pressure of H2OPartial pressure of O2 = 101 kPa - 42.3 kPa = 58.7 kPaLet n be no. of mol of O2 collected in jar.(58.7 x 10^3)(87 x 10^-6) = n(8.31)(30+273)n = 2.03 x 10^-3Explanation for 3b(ii)In 3b(i), you found amount of heat required to raise the temperature of the calorimeter by 1 degree Celsius.In 3b(ii), temperature rise =

2007 MJC Prelims Paper 2 FAQs

2007-10-23T08:23:00.000-07:00

Explanation for Q3b(ii)Electron to be removed from K+ is from 3p orbital whereas electron to be removed from the other elements shown is from 4s orbital, which is of higher energy. Hence, K+ has highest 2nd IE.Explanation for 3d(iv) no. 2A is unlikely to be HOOC-C(triple bond)C-COOH.Too difficult to dehydrate (HOOC)CH=C(OH)(COOH). (NOT in syllabus)Explanation for 4eK = [butylparaben (organic)] /

2007 HCI Prelims Paper 2 FAQs

2007-10-23T07:59:00.000-07:00

Explanation for Q1c Hydromagnesite decomposes to give MgO, CO2 and H2O. MgO dissolves in excess HCl(aq) to give MgCl2 and H2O. Excess HCl(aq) added is neutralised using NaOH(aq).Explanation for Q3a(iii)The buffer in blood has a large reservoir of H2CO3 (weak acid) and HCO3- (conjugate base of weak acid).When H+ is added, HCO3- reacts with all the excess H+ and converts them to H2CO3.Thus, your

2007 VJC Prelims Paper 1 FAQs

2007-10-23T07:43:00.000-07:00

Explanation for Q3ClO2- is bent, i.e. O=Cl--O-, where Cl has 10 e- around it (inclusive of 2 lone pairs) and O bears the negative charge. Bond angle of ClO2- is similar to that of H2O. About 105 degrees.Explanation for Q32Fix T. Then draw a vertical line upwards to cut both curves and extrapolate horizontally to get values for fraction of X. At a fixed T, more X is present when pressure is lower

2007 PJC Prelims Paper 1 FAQs

2007-10-23T07:39:00.000-07:00

Explanation for Q32 (Errata)Electronegativity: Na < Mg < Al << ODifference in electronegativity of elements in oxides: Na2O > MgO > Al2O3 (i.e. third statement is TRUE)Answer is A.

2007 NJC Prelims Paper 1 FAQs

2007-10-23T07:10:00.000-07:00

Explanation for Q7p x 1.01 x 10^5 x V x 10^-6 = (m/M)RTp x 1.01 x 10^-1 = (m/V)(RT/M)density = m/V = 0.101pM/(8.31T) = 273pM/22400TExplanation for Q8An acid dissociation reaction is shown. It is a heterogeneous eqm where H2O is a solvent (i.e. in great excess), so [H2O] is NOT in Ka expression. Ka = ([H3O+][S2-])/[H2S].NH4+ + H2O <--> NH3 + OH- and OH- reacts with H3O+ of the eqm.CO32- also

2007 HCI Prelims Paper 1 FAQs

2007-10-23T06:47:00.000-07:00

For Q4, see previous post by Mr WTY.Explanation for Q12O2 (i.e. gas K) is formed at anode.4OH- --> O2 + 4H+ + 4e-For 1 mol of O2 formed, 4 mol of e- are released.These e- must be used to discharge the cations, Jn+.1 mol of O2 is formed when 2 mol of Jn+ are discharged.2Jn+ + 4e- --> 2JThus, n = 2.Gas L is Cl2.2Cl- --> Cl2 + 2e-Note that the same quantity of electricity is used, i.e. 4 mol of e-

Acidity of Organic Compounds

2007-10-23T06:38:00.000-07:00

"Is CH3CH2OH deprotonated when pH>7, i.e. alkaline?""Does ethanol neutralise aqueous sodium hydroxide?"The answers are: NO!Acidity decreases in the order: carboxylic acid > phenol > water (it's not acidic!) > alcohol."What is the product formed when CH3CHBrCH2CH2COOH is heated with NaOH dissolved in ethanol?"The product is CH3CH=CHCH2COO-Na+. To get the carboxylic acid, you need to add H2SO4(aq).

A Level Chemistry Paper (Nov 2006 / Jun 2007)

2007-10-23T04:06:00.000-07:00

For students who are using the Dyna ten-year series (2007 Edition), please take note of the following errata.Nov 2006 Paper 1 (MCQ)Q4 Answer is A.Q8 Answer is A.Q32 Answer is A.In addition, please take note of the following.Nov 2006 Paper 1Q33 Option 3 reads "The enthalpy change of combustion of diamond is greater than that of graphite". The word "greater" is used to describe the magnitude of the

Answers to MOCK MCQ

2007-10-23T00:09:00.000-07:00

Q1-5 C C C D CQ6-10 D B C D CQ11-15 C C B C BQ16-20 D B B A C

HCI 07 prelims P1 Q4

2007-10-21T18:25:00.000-07:00

This is a brilliant question. Now the key is, water and Iodine will condense (to liquid and solid respectively) when the temperature is cooled to room temp (298K). So all the gas thats remaining is Argon. Therefore the no of mols of gas, n, is totally accounted by argon.using the eqn, nR=p1V1/T1=p2V2/T2, where p1 is 101kPa, V1 is 4000 cm3(thats the volume occupied initailly by argon), T1 is 423K

YJC Paper 2 Q1 d(iii) Answer Key

2007-10-16T16:59:00.000-07:00

The answer to YJC Paper 2 Q1 d(iii) was left out of the printed answer key. The answer is:CaCO3 is insoluble in water, hence the presence of solid CaCO3 would indicate that all excess acid has reacted/been removed.

HCI H3 Prelim Answers

2007-10-16T01:40:00.001-07:00

Hi! The answers for the HCI H3 Prelims are out. Please do a copy for yourself. Take care yah. =)

Errata (H2 Chem Specimen Paper Solutions)

2007-10-08T03:51:00.000-07:00

Hi All.Please take note of the errors in the "worked solutions" of H2 Chem Specimen Paper 1 (MCQ).Q22 The third step of the reaction scheme shows sodium benzoate as the product after alkaline hydrolysis. That is incorrect. The product should be C6H5CH2COO-Na+.Q27 There are five (NOT four) -OH groups in a molecule of glucose.Thanks to Natalie for pointing out the errors.

The Last Lap...

2007-10-07T00:41:00.000-07:00

H3 Prelim Papers from Other JCs

2007-10-05T02:03:00.000-07:00

The H3 prelim papers from HCI, NJ and VJ are at the photocopy shop. Please do the photocopying yourself. Answers for the HCI paper are not out yet, we will update you when we receive it.We really need you to exercise true Rafflesian spirit..by preserving the original copy as it is!!There will be NO mock paper for H3, as the revision time table is already very tight. Implement the exam conditions

H2 Chemistry ACJC, TJC Suggested Solutions

2007-10-03T22:10:00.000-07:00

Dear students, at the time of printing, the suggested solutions of ACJC P1, TJC P1 and TJC P3 were not available. A copy has been placed in the photocopy store. ACJC PAPER 1BADCB CDBBD ACBBB ABADA ACDBA DACAC AACDD BBDABTJC PAPER 1BAADC CDCDC DBADC AAADC CCBBD CADCB CBCDD CDBDC

H2 Chem Revision Lectures / Mock Papers

2007-10-02T18:38:00.000-07:00

Students who scored E, S or U for H2 Chem in the Prelims must attend revision lectures and sit for Mock Papers. Please see the details below. Direct all queries to your respective tutors.8 Oct 07 (Mon), 0755 - 0945, LT1 and LT3H2 Specimen Paper debrief22 Oct 07 (Mon), 1330 - 1515, LT1 and LT32007 June Paper debrief + Mock Paper 1 (MCQ)24 Oct 07 (Wed)Session 1 (A-D graders): 1045 - 1330,

H2 Chem Revision Tutorials

2007-10-02T18:19:00.000-07:00

Students who scored E, S or U for H2 Chem in the Prelims must attend revision tutorials. Your tutors will tell you what you should prepare for each tutorial. Please direct all queries to your respective tutors.Dates: 11 Oct 07 (Thu), 16 Oct 07 (Tue)Time: 0755 - 0945Venues:A43 - Ms Chua LCA44 - Mrs Chung ALA45 - Mr Eric GweeA46 - Ms Jolene TanA47 - Ms Lee LSA48 - Mrs Poh SJ (aka Mdm Lee)B41 - Mrs

Prelims Debrief

2007-09-28T21:27:00.000-07:00

Congratulations to all of you who have managed to achieve your goal for the Prelims. As reflected during the debrief, we have seen a good proportion of students who have shown improvement for the Prelims and hope that you continue on your way towards your goal for the A levels. For those who have yet to achieve your desired grades, please don't give up. As Thomas Edison once said, many of life's

TIPS for Exams

2007-09-13T03:26:00.000-07:00

Materials required: IC or student pass, stationery and calculatorData Booklet will be provided by the examiners.Have plenty of rest before the paper. Don't burn midnight oil. It'll likely do more harm than good.Arrive early and check if you have gone to the correct venue. Refer to the seating plan before you enter the examination hall.Read ALL questions before you begin answering. Start with the

MOCK PRELIMS

2007-09-05T00:11:00.000-07:00

Dear students, please note that the mock prelims start at 9AM and NOT 8AM.VENUE: LT1TIME: 9-12nnAll the best with your revision!

Chemistry Mock Prelims

2007-09-05T00:06:00.000-07:00

Please take note of the details of the Mock Prelims.Date: 6 September 2007 (Thu)Time: 9 am to 12 noonVenue: LT1Please bring along your stationery (including writing paper), calculator and Data Booklet.Do come prepared :D

Inorganic Quiz MCQ Answers

2007-08-28T23:38:00.000-07:00

The answers to the Inorganic Quiz MCQ are:CBAC BDAC ADDB BDBC CBDD BD

Errata for Inorganic MCQ Quiz Q12

2007-08-28T23:34:00.000-07:00

Take note that for Q12 (Inorganic MCQ Quiz), please change chlorine to bromine.

Erratum: Physical Chemistry MCQ Practice 2

2007-08-23T06:58:00.000-07:00

Dear Students,Please note that the answer for Q12 of Practice 2 is B, not C.The explanation given in the suggested solutions is correct.

Reminders

2007-08-21T07:19:00.000-07:00

H2 ChemistryChemistry Lecture Test 7B (Thu, 23/8)Topic: Organic Nitrogen Compounds (Biochem component)Chemistry Remedial Test (Fri, 24/8)Topic: Organic ChemistryTime: 3.15 pmVenues: LT3 for SO3 + SO7 and LT6 for SO6H3 ChemistryPlease print the suggested solutions on your own at the photocopying shop.

ACJC Prelim 2006 Paper 1 Answers

2007-08-19T22:19:00.000-07:00

Q1-20 DDCDC BCADC CDDBB ACAACQ21-40 CCADD BADDA BDBDD AADBA

Just a small note to the answer for H3 tutorial qns on NMR

2007-08-09T23:00:00.000-07:00

This is another FAQ. Many students ask, are the two protons on the =CH2 of the terminal alkene equivalent or not?The answer is, it depends.1) if the two groups on the other carbon are not the same, then the two protons are non equivalent. eg CH3CH=CH2. the two protons on CH2 are not equivalent2) if the two grops on the other carbon are the same, then there is symmetry and the two protons are

Term 3 Week 8

2007-08-07T10:51:00.000-07:00

Dear students, hope that you're having a good and restful, yet productive break:)Just wanna remind u about Inorganic Chemistry lecture on Tuesday. You should complete your Inorganic Chemistry worksheet prior to the session!On Thursday we will have an Inorganic Chemistry lecture test. Do prepare well for it!:)S&U students will be taking the Equilibria Remedial test on Friday. It will be at 3.15pm,

Naming Transition Metal Complexes + Errata in Physical Chem Revision Part 2

2007-08-01T06:29:00.000-07:00

Naming Transition Metal Complexes (Lecture Notes 23, p15, Q5)(a) hexaaquanitrosyliron(II) ion; tris(ethane-1,2-diamine)cobalt(III) ion; tetraamminecopper(II) chloride (this is a salt); tetracarbonylnickel(0); tetrachlorocuprate(I) ion; hexacyanoferrate(III) ion(b) [Co(NH3)5(NO2)]Cl2; K3[Fe(CN)5(NO)]; [Pt(NH3)4][PtCl4]Errata in Physical Chemistry Revision Part 2:For Q1, please note that the labels

H3 consultation schedule

2007-07-26T06:16:00.000-07:00

Hi all. Most of you will know the H3 cohort has been divided into smaller groups to facilitate consultations. We decide to do this based on frquent feedback that the H3 students need more guidance and opportunity to clarify their doubts. However there are too many students and too few teachers to make it possible for all students to be rostered for consultation on the same day.That means to say,

How Should I Study?

2007-07-20T07:13:00.000-07:00

I've been asked this question far too many times.Every person adopts a different way of studying. Some people like to study in a group while others prefer to study alone. Some may go to the library while others stay in the comfort of their home. Some may like to sit in an armchair while others may want to lie on the bed. Some may choose to study in the daytime while others burn the midnight

Errata in H3 chem spectroscopy tutorial answers

2007-07-11T23:12:00.000-07:00

Hi all,referring to part 2 question 7.The answer should be: Nitrogen has an odd valency and form 3 bonds. Hence a molecule containing an odd number of nitrogen atoms will have an odd number of hydrogen atoms. Since C, O, N have an even mass number but H has an odd mass number, an odd number of hydrogen atoms will make the total Mr an odd number, giving an odd-numbered M+ peak.

The 3Ps to success

2007-07-11T04:22:00.000-07:00

If you happen to be a "weak" student in chemistry, hopefully this will encourage you. What can you do to get a better grade in the upcoming examination? Personally, I feel that these 3 Ps are very important:1) Perserverance - Perhaps you did not score a good grade in this common test, but this does not mean that you will not see your As at the end of the day. I had an ex-student telling me that

tag board deleted

2007-07-11T00:16:00.000-07:00

I have deleted the tagboard. Some semi-intelligent creatures have been impersonating others. Do they really think they cannot be caught? However, it is not worth the time to track them, and I do not care to entertain such nonsense. If you fail to appreciate the privileges given to you, privileges will be taken away. Henceforth, we will not entertain any questions on this site.--------------------

2007-07-10T14:46:00.000-07:00

My sister-in-law had high blood pressure during her pregnancy and was diagnosed with pre-eclampsia (high blood pressure during and just after pregnancy). 4 days after the birth of her baby, she had to be warded in ICU where she was injected with MgSO4 to lower her blood pressure. I was thus particularly interested in the uses of MgSO4 when I came across it while teaching Group II, and found out

Errata on H3 resource book

2007-07-09T20:59:00.000-07:00

pg 82 point 2, third paragraph.SHOULD BE: Thus the Z isomer of diethylstilbesterol, a synthetic oestrogen, is only one-fifteenth as active as the E isomer.

H3 Chem Spectroscopy Tutorial Answers

2007-07-09T20:41:00.000-07:00

The answers have been sent to the photocopy shop today, and will probably be available late tomorrow. I've also included tables of data for NMR chemical shifts and IR absorptions.In addition for Part 2 Question 4(the UV question) you need to plot the curve accurately and becareful of unit conversions and scaling factors for original sample against diluted standard aliquots. I've only given the

CT2 results

2007-07-04T20:38:00.000-07:00

Well done and congratulations to the following: Top 10 classes1. 07S03R2. 07S03A3. 07S06R4. 07S06I5. 07S03F6. 07S03I7. 07S06L8. 07S03H9. 07S03P10. 07S03KTop 10 improved classes1. 07S03E2. 07S06R3. 07S03N4. 07S06H5. 07S06B6. 07S06C7. 07S03P8. 07S03D9. 07S03K10. 07S06STop 3% scorers07S03R TAN SHI MIN07S06A WU MENGFEI07S06I LI SHANGHUI07S03Q TAY SEI KIAT07S06I LEE LI XUAN07S03R LEE HWEE JUIN07S03J

shokubutsu

2007-06-25T07:13:00.000-07:00

I just bought a refill pack of shokubutsu(tm of Lion Corp Japan) Orange and seaweed shower foam (love the smell) which the package says, contains "100% cleansing ingredients from plants"So out of curiosity, I actually read the ingredients list (anyone here ever read the ingredients list on product packages and is able to make sense of it? heh that's what chemistry can do for you...)So here's the

Hello!!!

2007-06-24T20:40:00.000-07:00

Hi all!!This is a new blog specially set up by rjc's chem dept for you. It'll be a great way to facilitate communications, for example, to make announcements (students keep bugging us for details of announcements already made in lectures and on notice boards >< ) , and FAQs etc.I'll get around to doing up the relevant sections like a tag-board and a counter.. that'll be up soon... firstly we