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在碱金属的碳酸氢盐中,KHCO_3与 NaHCO_3的溶液度相差比较大,查有关手册可知:20℃时,KHCO_3在水中的溶解度为33.2克,而 NaHCO_3在水中的溶解度却只存9.6克。碳酸氢盐晶体中含有HCO_3~-离子。一个分子中的氢原子可以通过范德华力与另一分子中电负性很大而原子半径较小的氧原
Among the alkali metal bicarbonates, the difference in solution between KHCO 3 and NaHCO 3 is relatively large. Check the relevant manuals that the solubility of KHCO 3 in water is 33.2 g at 20°C, while the solubility of NaHCO 3 in water is only 9.6 g. The bicarbonate crystals contain HCO_3~- ions. Hydrogen atoms in one molecule can pass van der Waals forces to oxygen atoms in another molecule that have a large electronegativity and a small atomic radius