Latest updates

Catalysts questions 19 August 2019

1. Catalytic converters used in automobiles typically contain platinum, palladium and/or rhodium metal coated onto a honeycomb ceramic surface. They convert oxides of nitrogen, NOx, carbon monoxide and... more

HL Questions on each sub-topic free13 August 2019

Both Core and AHL questions are included.1.1 Nature of matter & chemical change questions 1.2 Empirical & molecular formula questions1.2 Mole & Avogadro's constant questions more

Creating student accounts free7 August 2019

Beneath your name on the home page you will see 'My account' and 'Student access'.Note that you can gain student access from any page (not just the home page) simply by clicking on the arrow by your name... more

Using student access free7 August 2019

This website is primarily for IB chemistry teachers but the aim of all of us is to enable our students to realise their full potential and gain as high a mark as possible in chemistry for their IB Diploma. more

Complete course for studentsfree7 August 2019

The purpose of this section is to provide complete syllabus coverage specifically for students who have been signed up to student access by their teacher in a subscribing school. It is designed to be... more

Identification from spectra: Question 20 free7 August 2019

Identify compound T from the data (a – d) given and explain how you arrived at your answer.a) Elemental analysis of compound TElementPercentage by massCarbon85.60 more

Identification from spectra: Question 167 August 2019

Identify compound P from the data (a – d) given and explain how you arrived at your answer.a) Elemental analysis of compound P.ElementPercentage by massCarbon43.96 more

Identification from spectra: Question 187 August 2019

Identify compound R from the data (a – d) given and explain how you arrived at your answer.a) Elemental analysis of compound RElementPercentage by massCarbon37.82 more

Identification from spectra (20) Answer7 August 2019

Answer to Identification from spectra: Question 20ElementAmount / molSimplest ratioCarbon85.60/12.01 = 7.131Hydrogen14.40 / 1.01 = 14.262 more

Identification from spectra: Question 19 28 July 2019

Identify compound S from the data (a – d) given and explain how you arrived at your answer.a) Elemental analysis of compound SElementPercentage by massCarbon54.52 more