This lab encompasses the specificity of TEK 8.5E: Investigate how evidence of chemical reactions indicates that new substances with different properties are formed. The sample answer key is provided in the preview file. Student answers can vary, but they must provide valid justification for their choices. This lab has eight stations with detailed data to be gathered at each station. Students should be in groups of four, but stations can be doubled for smaller groups. The precipitate station is a short youtube video.