Zinc oxide (ZnO) is a chemical compound commonly used in the manufacturing of ceramics, glass, and other materials. One way to determine the purity of ZnO samples is by using a titration method. In this method, a known amount of ZnO is reacted with an acid, and the amount of acid required to neutralize the basic ZnO is measured. This can be used to calculate the percentage of ZnO in a sample. The titration method for determining the assay of ZnO involves the following steps: Prepare a solution of ZnO in water. A common starting concentration is 0.1 M. Prepare a standard acid solution. Hydrochloric acid (HCl) is commonly used with a concentration of 0.1 M. Place a known amount of ZnO solution in a titration flask. A typical starting amount is 25 mL. Add an indicator to the ZnO solution. A common indicator is phenolphthalein, which changes color from colourless to pink when the solution becomes neutral. Slowly add the standard acid solution to the ZnO solution, while stirring continuousl
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