![]() ![]() Instant cold packs containing ammonium nitrate and water (4).Graduated cylinder, 100mL or metric measuring cup, liquid, with 100mL mark.Flash Tutorial: Ammonium Nitrate Dissolution. Instant cold packs are available at most sporting goods stores. ![]() Newspaper, scrap to cover your work surfaceÄigital scale, accurate to at least 1 g, such as the digital pocket scale fromįigure 1.Weigh boats or wax paper, cut into 10-cm squares (15, more as needed) used as a surface for weighing out the ammonium nitrate crystals.The water is in a separate bag within the cold pack. Use a plastic spoon to add 10.0 g of ammonium nitrate on the square/weigh boat.Place one of the wax paper squares on the scale.Ammonium nitrate from an instant cold pack. Stir the contents with a plastic spoon.Add 10.0 g of ammonium nitrate to the water in cup #1.Point the digital thermometer at the water's surface and push the "on" button to get the temperature.Record the starting temperature of the water in cup #1 in a data table in your lab notebook. You can record at longer intervals, such as 30 sec, if you choose.Record the temperature every 15 seconds (sec) until it stabilizes. ![]()
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