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Solubility Product Constant Lab Report

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Determine the Solubility-Product Constant for a Sparingly Soluble Salt
Abstract:
The Solubility-Product Constant of a sparingly soluble salt was determined by using a calibration curve to determine the connection between the concentration and absorbance (y=1629.8x+0.0117). After the compounds had been prepared, the absorbance was measured using a spectrophotometer. The (CrO42-) ion could be used to calculate the solubility-product constant because of the close stoichiometric association between the two. The average Ksp of Ag2CrO4 was 1.59x10-10 M.
Introduction:
Many elements come into the determination of the solubility-product constant for a sparingly soluble salt. One of these elements is the study of spectroscopy. Spectroscopy is defined …show more content…

Ksp is known as an equilibrium constant of the solubility product, but Kc is used for the equilibrium constant of the reaction. Ksp is a representation of the level at which a soluble solution can dissolve. The greater the solubility of a substance, the higher the Ksp. The constant of the value Ksp tells the degree where the compound separates in water. Some experimental techniques that are used to determine Ksp for a sparingly soluble salt are titration, spectrophotometry, and gravimetry. Ksp value shows the degree at which a solution is separated in water. When solving for Ksp it is important to take the concentrations of the products and multiply them. In the experiment when determining the Ksp of Ag2CrO4. We need to make the equilibrium reaction for the disintegration of Ag2CrO4. For instance the equilibrium equation …show more content…

The first Ksp ended up to 1.74 x 10-10 M. The second value was calculated to be 1.46 x 10-10. Lastly the third value ended up being 1.57 x 10-10. These three values ended up having an average Ksp of Ag2CrO4 was 1.59 x 10-10.
Discussion/Conclusion:
The purpose of this lab was to determine the solubility-product constant value of Ag2CrO4. The average value of Ksp was 1.59x10-10, but the value that was accepted for the solubility- product constant was 1.12x10-12. This shows that the percent error value of Ksp was 40.2 %. Percentage of error is used to help determine if the answer that was obtained is close to the value that was supposed to be found. Although when looking at what was received for the percent error, it shows that during the experiment there were some errors that had occurred. Some possible errors that could have happened while the experiment was taking place include miscalculating values, inaccurate measurements, and the equipment could have been setup

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