KBr is relatively soluble in water, yet its enthalpy of solutionis +19.8 kJ/mol. Which of the following statements providesthe best explanation for this behavior?(a) Potassium salts are always soluble in water.(b) The entropy of mixing must be unfavorable.(c) The enthalpy of mixing must be small compared to theenthalpies for breaking up water–water interactions andK–Br ionic interactions.(d) KBr has a high molar mass compared to other salts likeNaCl.

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.