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

Preparation of 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 of Sodium Potassium Tartrate

• 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

• 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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