CHEM 1101 Study Guide - Quiz Guide: Molecular Mass, Colloid, Chemical Equation
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5 Feb 2016
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The purpose of this lab is to identify the amount of chloride quantitatively in an unknown salt sample by using gravimetric analysis. In this lab a precipitation reaction is used to separate the chloride ions from the unknown salt sample, and this is made by adding another known salt solution to our sample. In this case, silver nitrate solution was added to our sample. The aqueous salt solutions then react, causing the rearrangement of their ions and forming 2 new salts from which only one is insoluble. The ionic equation of the precipitation reaction is: Silver chloride is extremely insoluble, but it actually still has some solubility that can be expressed by the solubility product ksp . The solubility product ksp is the equilibrium constant for a solid substance dissolving in an aqueous solution. Ksp is found through the following equation. (aq) + cl- (aq) agcl(aq)
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