HL and SL IB

Useful Wesbites:

Kognity book and assignments

Nail IB - Practice past paper questions (produces practice exams by topics and papers)

IB Dead - Really useful, downloadable, IB notes (have math and biology too)

Get revising - You can make useful online revision materials, timetables, etc. 

Prep Scholar - IB SL+HL Study Guide and Notes

IB Alchemy - IB Notes (similar to Bio Ninja)

Chem Libretexts - Great to read around the subject, or if trying to understand a topic in more detail

IB Chemistry (Ellesmere College) - Notes, videos and questions. 

Past Papers - Exactly what it says, past papers

Pestle - Past Papers by subtopic e.g. stoichiometry. 

IB Documents - Past papers and by topic to download as large zip file.  

Study Nova - Free IB Chemistry online revision course

Papa Cambridge - Past papers for all IB subjects

Revision Village - Revision and past papers

IBChemistree - Revision notes

Get revising - You can make useful online revision materials, timetables, etc.