Microfluidics for chemistry education. (a) Photograph of a paper microfluidic device to quantify amino acids in green tea extracts. Reproduced with permission from Cai et al., J. Chem. Educ. 90(2), 232–234 (2013). Copyright 2013 American Chemical Society. (b) Overview of microfluidic reactor for the two-step synthesis of azo dyes from aniline, sodium nitrite, and salicylic acid. Reproduced with permission from Feng et al., J. Chem. Educ. 92(4), 723–727 (2015). Copyright 2015 American Chemical Society. (c) Photograph of electrolysis of water on a chip. The cast PDMS chip is connected to two platinum wire electrodes. The stoichiometry of hydrogen and oxygen evolution can be visualized. Reproduced from Davis et al, J. Chem. Educ. 92(1), 116–119 (2015). Copyright 2015 Author(s), licensed under a Creative Commons Attribution 4.0 License.