The simple stuff mostly: beakers, test tubes, hot plates, burners, any chemicals you may use, and various measuring devices (burets, GLASS measuring cups, and pipets for liquids.) Most importantly is having the proper safety precautions. It may prove useful to have a fume hood with the proper ventilation and a chemical shower/ eye wash station. Always dispose of chemicals properly.
What chems may those be to start?
A Comprehensive Guide on Calibrating Oxygen Sensors