First, thanks for being concerned about the searchability of questions and keeping the quality of the site at a high level.
Our dream of dreams on the science-oriented sites is to have conceptual questions that we can use to close the "I have X g of powder"-type questions against. On the other side of that coin, though, we have to recognize that students tend to have trouble with specific examples, and shutting good quality questions (in which a user has actually made an effort to answer ahead of time) would drop our traffic down significantly. Obviously, the conceptual/foundation questions are something to strive for, but this isn't (yet) in the cards.
In a practical sense, as Klaus has nicely pointed out, we do quite a bit of policing as it is to try to rid the site of questions in which people have so kindly transcribed their homework question into the Ask Question page. I'm comfortable with the community deciding what is practical and useful, and we have quite a few users with the reputation to make their voices heard. If you don't yet have the privilege of voting to close and/or deleting posts, it's best to leave a comment on the question so that these users can then act accordingly.
What is the stopgap measure for the situation you describe? Suggest an edit to the title of the post that succinctly describes the general aim of the problem. This does make it quite searchable, so if someone is looking for "determining the X when given Y in a calorimeter" they can find it readily. This is much better than having a bunch of titles that say "I have a 2.0 M solution...", as you've presented in this question.