How much sodium acetate is needed to be dissolved in a 300mL of water?

i'm making HOT ICE.. its for a lab experiment, and one website says that at higher temperatures more Sodium Acetate will dissolve, and at lower temperatures less Sodium Acetate will dissolve in a given volume of water. well, let's say, about 80-90 degrees Celsius of water? can i dissolve and make the solution in a beaker above a Bunsen burner instead of a sauce pan? and how about the clean-up after the experiment? how will you dispose the products and leftovers? THANKS FOR THE ANSWERS. :)