Tips Archives - Mr Khemistry


Solving Organic Deductive Questions

Solving Organic Deductive Questions Compound J, C8H6O4, forms a molecule K, C8H10O3, when reacted with LiAlH4 in dry ether. However, when J was reacted with NaBH4 instead, a product of molecular formula C8H8O4 was formed. J gives an orange precipitate with 2,4-dinitrophenylhydrazine but does not give any precipitate when warmed with Fehling’s reagent. K reacts […]

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Distinguishing Organic Compounds

Distinguishing Organic Compounds         Suggest one simple chemical test to distinguish them from each other. State the reagents and conditions needed and give the expected observations for each compound.   Analysis: This pair of compounds are both dienes, meaning they both contain two C=C bonds.  We will not be able to distinguish […]

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Revision for A level Chemistry

Revision for A level Chemistry Students and parents (as well as teachers) are all getting nervous about the impending Prelims. Some parents are asking me why aren’t their children making progress in their studies even though they spent long hours revising and attending tuition. One of the main reason is that students have to reflect […]

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Lesson Structure

Recently i implemented a new lesson structure for the J2 classes, inspired by my Harvard teaching and learning course. It’s easily remembered by the acronyms ABCDE, inspired by my son’s fascination with alphabets. A for Aim – What’s the learning objective we’re trying to master today? B for Big Idea – What’s the underlying concept […]

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Posture for Learning

Did you know that there’s a posture for learning? I didn’t until quite someone pointed out the link between posture and our physiological state of mind.  A couple of examples: You get angry and your nostrils flare, face turns red and your fists clench.  Watching a scary movie and your heart beats faster, palms get […]

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Thinking about the “M” word

No, not money…Memory! 🙂 Many have argued that our system of education is antiquated because a good grade is usually dependent on memorizing large chunks of information.  Why do we need to remember so much information when we have unprecedented access to huge amounts of data to literally anything at our fingertips? I would say […]

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Reading and learning

Reading and Learning Recently i had a revelation on why students struggled with paper 3 i.e. free response questions, as compared with structured questions in paper 2. It has to do with the ability to read and glean useful information from words. This problem is especially stark for science students, because they tend to fall […]

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Meta Learning Part 2

Meta Learning Part 2 This post is a follow-up to Meta Learning post. Recently one of my students did not complete her homework, citing “no stamina”. I told her most likely it is due to mental fatigue, as she is using a lot of her mental energy to do the organic questions. This is commonly […]

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Meta Learning

Meta Learning I’ve recently completed my reading challenge for 2018, twelve book, in four months and a week. Realised that i’ve set too low a bar for myself. Walked right over it. Will be doubling the number of books to read for the rest of the year. Reading and learning are intricately linked, but reading […]

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Group vs Private Tuition

Group vs Private Tuition No matter whether you’re a student or parent looking for tuition for your child, this question undoubtedly popped into your mind. So what are the pros and cons of each and which is more suitable for you? Read on to find out… Group  Follows a set topic schedule. Limited interaction during […]

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