The research about the learning cell type of cooperative learning model has been conducted in SMAN 2 Pekanbaru. The purpose of this research is to improve the student achievement on the topic solubility and constant solubility product (Kelarutan dan Hasil Kali Kelarutan Ksp) in class XI SMAN 2 Pekanbaru. The type of this research is experimental research with experiment design randomized contro…