Potassium Nitrate Solubility

I. Introduction

When soluble ionic compounds dissolve in water is due because ionic compounds are strong electrolytes and they completely dissolve and once it reaches saturation point it means it has reached the equal to the maximum amount of water. Solubility product constant (Ksp) states to the product of the concentration of the ions that are present in a saturate solution of ionic compound. Thermodynamic parameters indicates variables such as delta G, H, or S and it is to measure the concentration of reactants and products at equilibrium and calculation the value of equilibrium energy chance is related to value of equilibrium constant of a particular temperature. The objectives of the experiment is to measure the solubility of potassium nitrate in water at several temperatures and to calculate Ksp, delta H, delta G, and delta S for potassium nitrate dissolving in water. The procedural modification in this experiment was the total of KNO3 for each determination. The safety precautions was handling the KNO3 solution with care it is an oxidizing agent and may intensify fire. Being extra careful when stirring the test tube with metal temperature probe to avoid breakage and most importantly is washing your hands before leaving the lab.

II. Results Analysis

A. Data

B. Discussions

When the first crystal of KNO3 appear in the solution recrystallization is occurring. KNO3 is a solid and in water it still remains to its texture. Although once heated and forming to its liquid form letting it cool until crystal begin forming soon after equilibrium was reached. The temperatures when the crystals form as the total volume of solution increased is when crystal are first observed which is when the reaction is at