During this unit My favorite thing was the chemical reactions lab because it was fun to make different combinations of things. In this chapter I learned that the PH scale measures the strength of acids and bases, I learned about dissolving and if you stir the wayer it increases the rate of dissolving.I also learned how to make solutions such as sugar in water. What I liked least about this chapter was writing  in the study guides. What is the abbreviation for calcium chloride?