A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

We have completed the final week revision on physical and organic.

Topics covered as follow:
Chemical Bonding
Reaction Kinetics
Chemical Eqm
Ionic Eqm
Electrochemistry
Elucidation 2 and 3

All the Best for your coming Mid Year Exam
From Alvin and Mr Ong

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

In the month of July, we will be revising on physical chemistry on the first three week and the last will be revising on Organic Chemistry

This week we will be revising on Atoms, Molecules, Stoichiometry. Redox and Gases

JC/H2/H1 Chemistry Tutor Singapore

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

Catalyst

A catalyst is a substance that increases the rate of a chemical reaction without itself being chemically changed at the end of the reaction

Characteristics of the catalyst:
1. Required in small amounts
2. Do not affect the enthalpy change of the reaction
4. Increase the rate constant of the reaction.
5. Accelerates the reaction, rather than initiate it.

An autocatalyst is a product of a chemical reaction which is capable of acting as a catalyst for the reaction.

A homogeneous catalyst exists in the same phase as the reactants

A heterogeneous catalyst exists in a different phase from the reactants.

Cheers! From A-Level Chemistry Tutor

[SY LewParticipant]

Hi Mr Ong, I would like to request for solutions for A-level chemistry papers from 2002 to 2007. Thanks

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi Shu Yuan

Noted

Cheers! From A-Level Chemistry Tutor

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi Chu Wen

2HI ——-> H2 + I2
<——
Initial – 0.5 0.5
Change 2x -2x -2x
Eqm 2x 0.5-2x 0.5-2x

Kp = (PH2 * PI2)/PHI^2 = ( 0.5 – x)^2/2x = 4.44
solving x = 0.096
PH2 = 0.5 – 0.096 = 0.404 atm

Cheers! From A-Level Chemistry Tutor

[Justin NgParticipant]

MCQ Periodicity
11) Nov’09/7
12) NJC’09/H1/6 – why Ga then Ca?
19) TJC’09/27 -∆H of vaporization graph implication?
34) CJC’09/6 -AlF3 ionic cpd?
49) HCI’09/14 – why not Al?
63) MI’09/14 – Why transition metals have greater densities than Group II metals?
67) VJC’09/36 – How to read 2nd IE Graph? all elements 1st IE ‘shift’ right from 1st IE Graph?
76) RI’09/26- Why electronegativity between elements in each cpd do not increase?

MCQ – Intro to Org Chem
13) MI’09/23
15) NJC’09/H1/17
18) NJC/09/18
25) RI’09/20
26) NYJC ‘09/21
27) AJC’09/20
31) HCI’09/21

RI H2 Chem Revision Tutorial: Isomerism
Q1)
Q4)
Q5)
Q7)
Q11)
Q12)
Q23)
Q24)
Q26)
Q30)

[Justin NgParticipant]

MCQ Chemical Bonding
ACJC’09/6
ACJC’09/32
AJC’09/H1’8
CJC’09/H1/26
CJC’09/7
DHS’09/H1/6
HCI/09/31
IJC/09/32
MI’09/H1/8
MJC’09/H1/27
MJC’09/31
NJC’09/H1/7
NJC’09/33
Nov’09/H1/7
Nov’09/32
NYJC’09/H1/6
PJC’09/H1/5
RI’09/4
YJC’09/H1/7

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

Good effort for those students completed 2007 A Level papers

Please complete 2008 A level Papers by this week.

Contact me if you have any questions

All the Best to the students whose are taking exam this week

Cheers1
From A level Chemistry Tutors

[Justin NgParticipant]

MCQ Hydrocarbons
AJC’09/25
AJC’09/39
AJC’09/H1/27
CJC’09/23
CJC’09/39
HCI’09/26
MJC’09/H1/17
PJC’09/22
RI’09/20
RI’09/21
TJC’09/13

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

2012 J2 Chemistry Revision Programme start 7 Oct

Topics Covered

AMS Challenging Qns/Gases
Chemical Bonding/Redox
Reaction Kinetics
Chemical/Ionic Equilibrium
Chemical Energetics
Electrochemistry
Organic – Distinguishing Tests
Organic -Planning
Organic – Elucidation
Inorganic Chemistry

From A Level Chemistry Tutor

[Genevieve ChiaParticipant]

Hi Mr Ong,
Could you post the solutions for the 2010 and 2011 A level H2 Chem papers please?
Thank you!

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi Genevieve

Posted

Cheers!

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

You are encourage to do 2012 Prelim Papers

1) JJC
2) YJC
3) CJC
4) PJC
5) TPJC
6) SRJC

Cheers! From A level Chemistry Tutors

[adminMember]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

Answers for the last min cheimistry revision

1) O2 produced because water in excess in aqueous NaCl. Cl2 produced because Cl- in excess in conc NaCl.

2) Cathode Reaction: 4H20 + 4e -> 2H2 + 4OH-
Anode Reaction: 2H20 -> O2 + 4H+ + 4e

3) Chloride is bigger in size as compared to fluorine. It is hence more
easily polarised to form a covalent bond

4) dative bond between nitrogen and boron

5) maximum density of water is at 4degrees. when water cools below 4 degrees, the volume expands. The hydrogen bonds traps the molecules into a rigid 3D structure that aligns water molecules in such a way as to create huge gaps between the molecules

Finally remember the 5Cs

Confidence
Concept
Careful
Conscious – Time
Check

From A Level Chemistry Tutors

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