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How to precipitate potassium nitrate crystals from a mixed solution of potassium nitrate and sodium chloride in a mass ratio of 1:1?
Cooling the hot saturated solution;
Since the solubility of sodium chloride varies little with the temperature and the solubility of potassium nitrate varies much with the temperature, the potassium nitrate crystal can be separated from the mixed solution of sodium chloride and potassium nitrate by cooling the hot saturated solution.
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A small amount of sodium chloride is dissolved in the saturated solution of potassium nitrate, crystals are precipitated after cooling, and the remaining liquid () A. Dissolved sodium chloride only B. Dissolved potassium nitrate only C. may be an unsaturated solution of sodium chloride, but must be a saturated solution of potassium nitrate D. may be an unsaturated solution of potassium nitrate but must be a saturated solution of sodium chloride A small amount of sodium chloride is dissolved in the saturated solution of potassium nitrate, crystals are precipitated by cooling, and the remaining liquid () A. Dissolved sodium chloride only B. Dissolved potassium nitrate only C. may be an unsaturated solution of sodium chloride, but must be a saturated solution of potassium nitrate D. may be an unsaturated solution of potassium nitrate but must be a saturated solution of sodium chloride
Solubility of different substances is affected by temperature. Solubility of potassium nitrate increases with the increase of temperature. Solubility of sodium chloride is not affected by temperature. Saturated solution of potassium nitrate containing a small amount of sodium chloride impurity is cooled to precipitate crystals. The remaining solution is still saturated solution of potassium nitrate. But...
Solubility of different substances is affected by temperature. Solubility of potassium nitrate increases with the increase of temperature. Solubility of sodium chloride is not affected by temperature. Saturated solution of potassium nitrate containing a small amount of sodium chloride impurity is cooled to precipitate crystal. The remaining solution is still saturated solution of potassium nitrate. But...
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- 1. What method is used to separate and purify sodium chloride crystals from a mixture of sodium chloride and potassium nitrate (small amount)? If there are 10g sodium chloride crystals in the original mixture, will the mass of these crystals be less than 10g after purification?
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