Solubility graph of compounds in water with questions and handwritten answers.
Solubility graph showing the solubility of various compounds (KBr, NaCl, NH₄Cl, KNO₃, Yb₂(SO₄)₃) in grams per 100g of water at different temperatures, with handwritten annotations and calculations for potassium bromide and potassium nitrate solubility at specific temperatures.