✔ 最佳答案
Like dissolves like(相似溶於相似)用例子解釋一目了然:
NaCl (polar substances) are soluble in polar solvents (water), but insoluble in non-polar solvents (benzene, ethoxyethane, 1,1,1-trichloroethane...etc.)
Alkanes (non-polar substances) are soluble in non-polar solvents (benzene, ethoxyethane, 1,1,1-trichloroethane...etc.), but insoluble in polar solvents (water).
註:polar解極性,指帶有電荷(charge)的意思。