What are the different types of JC Chemistry tuition classes available at your centre?

We have 3 modes of learning for students to choose from: weekly physical classes at Bishan; weekly online lessons via Zoom; and on-demand video lessons.

Are you the only Chemistry tutor conducting the classes or do you engage other tutors to do that?

Please be rest assured that I conduct all my classes personally and I do not engage other tutors to teach at my centre.

How well do your students perform after attending your H2 Chemistry tuition classes?

Most of my students showed improvements by at least 3 grades and more than 80% have attained distinction for A Levels. The earlier the students join my classes, the more confident I am in improving their grades.

What is your class size at Bishan?

Usually the class size is around 10 to 12 students. Max class size is 16 pax.

Is there makeup lesson if I miss a class?

Yes makeup lesson is available in the same week subject to availability. If makeup class is not possible, the student can view the recorded video lessons at Google Classroom.

Do you have trial lesson available? How much is it?

Yes we do. Fees for trial lesson are for Bishan class and for Zoom online class.

Does your centre offer O Level chemistry tuition? Do you teach IB / IP chemistry tuition? How about H1 Chemistry?

Chemistry Guru specialises in H2 Chemistry for JC1 and JC2 or IP Year 5 and IP Year 6 students only. Find out all the information about A Level H2 Chemistry and the detailed comparison between H1 and H2 Chemistry. We do not conduct lessons for H1 Chemistry, O Level Chemistry, IB Chemistry or IP Chemistry at IP Year 3 and IP Year 4.

Alcohol Reactions, Phenol Reactions - Organic Chemistry

In this video we go through the 7 Must-Know Reactions of Alcohols and 5 Must-Know Reactions of Phenols.

Must-Know Alcohol Reaction

1. Elimination or dehydration of alcohol to form alkene using concentrated sulphuric acid at 170 degree celsius or aluminium oxide, heat.

elimination of alcohol to form alkene

2. Nucleophilic substitution of alcohol to form chloroalkane using anhydrous PCl₅ or SOCl₂ at room temperature

nucleophilic substitution of alcohol to form chloroalkane

3. Nucleophilic substitution of alcohol to form bromoalkane using PBr₃ or HBr, warm

nucleophilic substitution of alcohol to form bromoalkane

4. Oxidation of primary alcohol to form carboxylic acid using KMnO₄ or K₂Cr₂O₇ in dilute H₂SO₄, heat or reflux. Secondary alcohols will be oxidised to ketones under these reagents and conditions.

oxidation of alcohols to form acids or ketones

5. Mild oxidation of primary alcohol to form aldehyde using K₂Cr₂O₇ in dilute H₂SO₄, reflux with immediate distillation

mild oxidation of primary alcohol to form aldehyde

6. Neutralisation of alcohol to form alkoxide using sodium metal at room temperature

alcohol 6 neutralisation

7. Tri-iodomethane test of some alcohols with iodine in aqueous sodium hydroxide, warm, to give yellow precipitate

tri-iodomethane test for alcohol to give yellow ppt

Must-Know Phenol Reaction

1. Neutralisation of phenol to form phenoxide using sodium metal or aqueous sodium hydroxide at room temperature

neutralisation of phenol to form phenoxide

2. Electrophilic substitution of phenol with bromine in organic solvent at room temperature to form 2-bromophenol and 4-bromophenol

electrophilic substitution of phenol to form 2-bromophenol or 4-bromophenol

3. Electrophilic substitution of phenol with aqueous bromine at room temperature to form 2,4,6-tribromophenol

electrophilic substitution of phenol to form 2,4,6-tribromophenol

4. Electrophilic substitution of phenol with dilute nitric acid at 20 degree celsius to form 2-nitrophenol and 4-nitrophenol

electrophilic substitution of phenol to form 2-nitrophenol or 4-nitrophenol

5. Electrophilic substitution of phenol with concentrated nitric acid in concentrated sulphuric acid at 50 degree celsius to form 2,4,6-trinitrophenol

electrophilic substitution of phenol to form 2,4,6-trinitrophenol