Potassium Hydrogen Phthalate Extrapure AR, 99.9% is slightly acidic, and it is often used as a primary standard for acid–base titrations because it is solid and air-stable, making it easy to weigh accurately.
Potassium Hydrogen Phthalate Extrapure AR-is slightly acidic, and it is often used as a primary standard for acid–base titrations because it is solid and air-stable, making it easy to weigh accurately.
Calcium chloride is an a white crystalline solid at room temperature, and it is highly soluble in water.
It has several common applications such as brine for refrigeration plants, ice and dust control on roads, and in cement.
It can be produced directly from limestone, but large amounts are also produced as a by-product of the Solvay process. Because of its hygroscopic nature, it must be kept in tightly-sealed containers.
Buffer capsules are used for preparation of phosphate buffer solutions with stable pH, buffer capacity and low temperature coefficients. Buffer capsules are easy to use and dissolve easily. After that the pH value is automatically set at the necessary level.
The purpose of adding sodium thiosulfate is to remove the excess iodine from the reaction mixture. This is important because iodine is a strong oxidizing agent and can cause side reactions with the organic compounds in the mixture.
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