Densities of the binary systems (NaI + H₂O) and (NaIO₃ + H₂O) were measured by an accurate Anton Paar Digital vibrating-tube densimeter at temperature intervals of 5 K ranging from 283.15 to 353.15 K at ambient pressure and molalities of sodium iodide and sodium iodate ranging from 0.16764 to 2.15208 and 0.02252 to 0.15952 mol kg^–1, respectively. Based on the experimental density data of the binary systems (NaI + H₂O) and (NaIO₃ + H₂O), thermal expansion coefficient (α) and apparent molar volume (V_ϕ) are obtained using an empirical equation calculation, and the diagram for the relationship between temperature and molality was plotted. According to the Pitzer ion-interaction model of the apparent molar volume, Pitzer single salt parameters β(0)v M.X, β(1)v M.X, and Cv M.X and their correlation coefficients a_i of the temperature-dependent equation f(i, p, T) = a₁ + a₂ln(T/298.15) + a₃(T – 298.15) + a₄/(620 – T) + a₅/(T – 227) (where T is the temperature in Kelvin and a_i values are the correlation coefficients) for NaI and NaIO₃ were first obtained by the least-squares method. The obtained apparent molar volumes agree well with the experimental values, and these results indicated that the single salt parameters and the temperature-dependent formula obtained in this work were reliable.

中文翻译：

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在常压下温度为283.15至353.15 K时，二元体系（NaI + H ₂ O）和（NaIO ₃ + H ₂ O）的表观摩尔体积

通过精确的Anton Paar Digital振动管密度计在环境压力和摩尔浓度为5 K的283.15至353.15 K范围内，通过精确的Anton Paar Digital振动管密度计测量二元系统（NaI + H ₂ O）和（NaIO ₃ + H ₂ O）的密度。碘化钠和碘酸钠的含量分别为0.16764至2.15208和0.02252至0.15952 mol kg ^–1。根据二元体系（NaI + H ₂ O）和（NaIO ₃ + H ₂ O）的实验密度数据，热膨胀系数（α）和表观摩尔体积（V _ϕ）是使用经验公式计算得出的，并绘制了温度与摩尔浓度之间的关系图。根据表观摩尔体积的皮特泽离子相互作用模型，匹兹单盐参数β（0）v MX，β（1）v MX和了Cv MX和它们的相关系数一个_我的依赖于温度的方程的˚F（我，p，T）= a ₁ + a ₂ ln（T /298.15）+ a ₃（T – 298.15）+ a ₄ /（620 –Ť）+一个₅ /（Ť - 227）（其中Ť是开尔文温度和一个_我的值的相关系数）为碘化钠和的NaIO ₃首先通过最小二乘法获得的。所得的表观摩尔体积与实验值吻合良好，这些结果表明该工作中获得的单一盐参数和温度依赖性公式是可靠的。