Purpose: Find crystallization temperatures for 7 concentrations of KNO3 and make a solubility graph Materials: KNO3, test tube, stir rod, weigh boats, hot plates, thermometer, 10 mL graduated cylinder. KOH + HNO 3 → KNO 3 + H 2 O [ Check the balance ] Potassium hydroxide react with nitric acid to produce potassium nitrate and water. Nitric acid - diluted solution. Error: same compound(s) should not be present in both products and reagents: KNO3. Please correct your reaction or click on one of the suggestions below: KNO3 + H2O = HNO3 + KOH KNO3 + H2O … Balanced Chemical Equation HNO3 + KOH → KNO3 + H2O Equation is already balanced. Error: equation can be balanced in an infinite number of ways: this is a combination of two different reactions.