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The dangers of “forever chemicals” to firefighters5 May 2021

The IB covers halogenoalkanes at both SL and HL in Topic 10 Halogenoalkanes & benzene but restricts the coverage to chloro-, bromo-and iodoalkanes. This is because the C−F bond (492 kJ mol−1) is so... more

Web links30 April 2021

Really you should only need one fantastic website, i.e......but no-one is perfect!There is so much else out there that it can be hard to know where to start and difficult to distinguish between good and... more

CaCO3 in egg shells10 April 2021

This practical can be adapted to determine the amount of calcium carbonate in a variety of different substances ranging from eggs shells to the shells of sea creatures, such as crabs, or in natural or... more

Analysis of aspirin tablets10 April 2021

It is an interesting fact that if you buy generic aspirin tablets they are very much cheaper than packets of branded aspirin. The analysis shows that they all usually contain the same amount of aspirin... more

Option A free10 April 2021

The Chalcolithic Age, an era between the Stone Age and the Bronze Age, involved the use of copper for tools but they were generally only possessed by the higher members of society and, unlike stone and... more

HL Practice Paper 1 (3) 10 April 2021

'Mock' Paper 1 multiple choice exam (3)InstructionsTime allowed: 1 hourAnswer all the questions.For each question choose the answer you consider to be the best.Use the periodic... more

HL Practice Paper 1 (2) 10 April 2021

'Mock' Paper 1 multiple choice exam (2)InstructionsTime allowed: 1 hourAnswer all the questions.For each question choose the answer you consider to be the best.Use the periodic... more

HL Practice Paper 1 (1) 10 April 2021

'Mock' Paper 1 multiple choice exam (1)InstructionsTime allowed: 1 hourAnswer all the questions.For each question choose the answer you consider to be the best.Use the periodic... more

SL Practice Paper 1 (3) 10 April 2021

'Mock' Paper 1 multiple choice exam (3)InstructionsTime allowed: 45 minutesAnswer all the questions.For each question choose the answer you consider to be the best.Use the periodic... more

SL Practice Paper 1 (2) 10 April 2021

'Mock' Paper 1 multiple choice exam (2)InstructionsTime allowed: 45 minutesAnswer all the questions.For each question choose the answer you consider to be the best.Use the periodic... more