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溶液中离子浓度的大小比较,是中学化学的难点之一(特别是强酸弱碱盐与弱碱或强碱弱酸盐与弱酸等混合溶液中,离子浓度的大小比较).要想比较这一类混合溶液中离子浓度的大小,首先耍弄清混合溶液中,弱根离子的水解程度和弱电解质的电离程度,谁占优势.下面我们结合几个例子说明这方面的问题. 一、通过混合溶液的酸碱性,判断水解与电离的程度大小,从而比较溶液中各离子浓度的大小1.0.1mol.L-1醋酸溶液和0.1mol.L-1 醋酸钠溶液等体积混合,混合后溶液呈酸性, 试比较溶液中各离子浓度的大小.
Comparison of ion concentration in solution is one of the difficulties of secondary chemistry (especially the comparison of ion concentration between strong and weak alkali salts and weak or weak alkali salts and weak acids). Class mixture of ions in the size of the concentration, we must first find out the mixed solution, weak ions and low ionization degree of weak electrolyte ionization degree, who dominated. Here we combine a few examples of this problem. First, through the mixed solution Of the acid-base, to determine the degree of hydrolysis and ionization size, so that the size of the solution compared to the concentration of each ion 1.0.1mol.L-1 acetic acid solution and 0.1mol.L-1 sodium acetate solution equal volume mixing, the solution was acidic , Try to compare the size of the ion concentration in solution.