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9 Pages • Essays / Projects • Year Uploaded: 2022
Solubility refers to the quantity that will dissolve to form a saturated solution (Mittal, 2017). The collision theory states that greater temperature will increase energy of molecules in reaction resulting collision (The Collision Theory, 2022). Increasing the concentration of any ionic substances will increase the frequency of collisions between reactants (Dillon, 2012). Potassium nitrate is an ionic compound (salt) that dissociates completely to form K+(aq) and NO-3(aq) (Fleming, 2019). Ionic compounds attracts water molecules (polar) when saturated in water, they dissolves if the attraction is strong enough to break bonds (Helmenstine, 2020). Therefore, the ions dissociate and disperse in the solution, each surrounded by water molecules to prevent recombination (Deziel, 2018). The solubility of most ionic solid in water varies with temperature. As an unsaturated solution cools, it will reach a temperature where crystallisation starts to occur. This is a process to purify substances and separate the solid form a solution (P.J.Jansens, 2000). Therefore, the original experiment was conducted to determine whether concentration of potassium nitrate in different temperatures of water changed its solubility. This relationship can be summarised as higher the temperature, the more concentrated the solute would be. A solubility curve was constructed to determine trends between temperature and solubility recorded for several different quantities of solute when KNO3 forms crystals.
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