5. what can be done to make a solid solute dissolve faster in a liquid solvent?
And if you have access to a sonicator (most labs do these days) sonication of a slurry also helps the solution to form. I made a mistake last year when I allowed some A2 girls to use my (prized!) sonicator to clean their jewellery; before long I had unclaimed necklaces and nose-studs and ear-rings in my sonic bath. At least they were clean.