Sometimes when performing a crystallization, one solvent alone will not work and you have to use a solvent-pair. will the solvent pair pentaine and water work? why or why not?

No, these two solvents cannot be used as a solvent pair.

Explanation:

Crystallization: It is a process in which a compound is soluble in liquid from which it is to be solidified as a precipitate.

For crystallization process, the two solvents used should be miscible otherwise, there is no use of using them.

In this case, the solvents given are water and pentane and their miscibility with each other is very far away. Water has very high polarity than pentane.

Therefore, water/pentane system will not work as a solvent pair.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.