The solubility of potassium nitrate KNO in water is directly affected by temperature. As the temperature of the water increases, the solubility of potassium nitrate also increases. This means that more potassium nitrate can dissolve in water at higher temperatures compared to lower temperatures.This relationship can be represented by a solubility curve, which is a graph showing the solubility of a solute in this case, potassium nitrate as a function of temperature. For potassium nitrate, the curve has a positive slope, indicating that solubility increases with increasing temperature.For example, at 20C 68F , the solubility of potassium nitrate in water is approximately 32 grams per 100 grams of water. However, at 100C 212F , the solubility increases to around 247 grams per 100 grams of water.This temperature-dependent solubility is a common characteristic of many ionic compounds and can be utilized in various applications, such as recrystallization for purification purposes or adjusting solubility for chemical reactions.