If I put a gallon of 10% cider vinegar in a shallow pan and let 1/2 gallon evaporate, will that make it double its strength?

I have plant trays I use in the spring and they get lime deposits from my water. I was looking at cleaning vinegar at lowes last night and it was $27+ a gallon. Regular vinegar is about $4 a gallon. The cleaning vinegar is only around 25%.