Hot ice experiment

I did this experiment for my ace, and the objectives were to find out if this was true or false, better ways to do it and to find out why does this happen. "hot ice" is a term for sodium acetate trihydrate, turning form the liquid form to the solid form. Sodium acetate trihydrate is a product from the chemical reaction of vinegar(acetic acid) and baking soda (sodium bicarbonate). During this chemical reaction, carbonic acid is formed and so is sodium acetate, but the carbonic acetate quickly decomposes into carbon dioxide and water, and thus while mixing it, we will get a dilute sodium acetate trihydrate(solution of sodium acetate and water). Thus to get saturated sodium acetate trihydrate, we must evaporat off the water. I evaporated it to about 10%