Solubility is a property of a solute and represents its ability to be dissolved in a particular solvent. The higher the solubility, the more it can dissolve in the particular solvent. For example, we can dissolve a significant amount of sugar in water, at a given temperature. In comparison, we can hardly dissolve any sand or sawdust in the same amount of water. This clearly shows that sugar is more soluble (or, has higher solubility) in water than sand or sawdust.
Here, we have two particles, one with a solubility of 10 gm in 100 ml of water, at 25° C and the other with a solubility of 24.7 gm in same sample of water. Since the second particle can dissolve a higher amount in water, it has more solubility. That is, particle B has a higher water solubility that particle A.
It should be noted that volume and temperature of the solvent was same in this case. In general, water solubility of solutes increase with an increase in water temperature. Similarly, a higher amount of a solute will be dissolved in larger volume of water. Here all the conditions were the same and hence the particle, with a greater amount of solute that dissolved in water, will indeed have higher solubility.
Hope this helps.
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