Densities and Refractive Indices of Potassium Salt Solutions in Binary {Ethanol+Water} Mixture of Different Compositions

Table 3

Calculated specific refractions (𝑅_𝐷) and molar refractions (𝑅_𝑀) of potassium salt solutions 10%, 20%, 40%, and 60% (v/v) ethanol + water (E-W) mixture at 303.15 K.

𝑋KCl	𝑅𝐷	𝑅𝑀	𝑋KBr	𝑅𝐷	𝑅𝑀	𝑋KI	𝑅𝐷	𝑅𝑀
10% (v/v) E-W
0.000579	0.2107	3.9982	0.000573	0.2112	4.0192	0.000571	0.2109	4.0099
0.001123	0.2105	4.0003	0.000971	0.2095	3.9993	0.001116	0.2089	3.9866
0.001596	0.2100	3.9964	0.001745	0.2086	4.0029	0.001730	0.2070	3.9510
20% (v/v) E-W
0.000645	0.2181	4.4030	0.000605	0.2166	4.3535	0.000618	0.2158	4.3334
0.001224	0.2174	4.4228	0.001255	0.2147	4.3381	0.001184	0.2148	4.3315
0.001876	0.2181	4.4753	0.001877	0.2143	4.3479	0.001848	0.2123	4.3008
40% (v/v) E-W
0.000748	0.2293	5.2654	0.000733	0.2277	5.2087	0.000737	0.2276	5.2002
0.001502	0.2296	5.3197	0.001453	0.2273	5.2255	0.001480	0.2257	5.1844
0.002218	0.2284	5.3333	0.002241	0.2260	5.2185	0.002232	0.2239	5.1649
60% (v/v) E-W
0.000926	0.2439	6.6025	0.000888	0.2410	6.5011	0.000914	0.2416	6.5112
0.001850	0.2438	6.6535	0.001818	0.2396	6.4931	0.001824	0.2394	6.4811
0.002777	0.2434	6.6969	0.002771	0.2386	6.5010	0.002738	0.2359	6.4155

𝑅_𝐷 and 𝑅_𝑀 = cm³·mol⁻¹.