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Sodium Potassium Tartrate (Rochelle Salt, NaKC₄H₄O₆·4H₂O)

Preparation

  • Sodium Potassium Tartrate Prepared by neutralizing a mixture of tartaric acid with equimolar amounts of sodium hydroxide and potassium hydroxide:

C4H6O6 + NaOH + KOH → NaKC4H4O6 + 2H2O

Properties

  • Physical Appearance: Colorless crystalline solid.

  • Solubility: Soluble in water, with a mildly sweet, tart taste.

  • Nature: Non-toxic, biodegradable compound.

  • Hygroscopic: Absorbs moisture from the air.

Uses

  1. Complexing Agent: Used in analytical chemistry, such as in Fehling's solution for determining reducing sugars.

  2. Food Industry: Serves as a stabilizer and emulsifier.

  3. Electroplating Industry: Used in electroplating and as a component in some piezoelectric materials.

  4. Mild Laxative: Can be used for its mild laxative properties.

Storage of Sodium Potassium Tartrate

  • Store in a cool, dry place, away from heat and direct sunlight.

  • Keep in a tightly closed container to minimize exposure to air and moisture.

  • Store away from strong acids and oxidizing agents to prevent chemical reactions.


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