Hot Ice Vs. Normal Ice
By: Joanna cordero
Hot ice is not real ice!
Normal ice: is made from freezing water at freezing point temperatures (what is H2O? It's Polar :) !), can be melted using heat, and it can be digested by humans. VS. Hot ice: Sodium Acetate (C2H3NaO2): used in molecular biology and biochemistry labs, heating pads, can be added to food in order to help prevent bacterial growth. FUN FACT: As an acid, sodium acetate acts as a neutralizing agent for basic/alkaline foods and can also act as a buffer to help maintain a specific pH. Soluble in water; if normal sodium acetate dissolved in water crystallizes will generate heat (Exothermic reaction). Crystallization; is a separation technique in which used to separate a solid that has dissolved in a liquid and made a solution. How to make hot ice: Step 1: Add 6 tablespoons of baking soda to a pot. Make sure to not use making powder! Step 2: Add 2 liters of white vinegar to the baking soda until it stops fizzing. Make sure to repeat this step little by little in order to avoid spilling and stir often. The reaction is complete when the fizzing has stopped and the solution is clear. Step 3: Boil the solution until about 90% of the water has evaporated. You will know the solution is ready when the top form is a crusty like form. You are left with a concentrated solution of sodium acetate which should be a slightly yellowish or brownish color. As the solution boils down, sodium acetate crystals will be left sticking along the inside of the pot. Make sure to not mix them back into the solution; you will need them later, so use a spoon to gather some and save them separately. Don’t let the film on top of your solution become thick or developed; this indicates that another reaction is taking place and will ruin your hot ice effect. Step 4: Move the completed solution into a smaller glass container and add 1 to 2 tablespoons of vinegar this will help keep the solution remain its aqueous state. Step 5: Make sure to stir solution to make sure all solids are dissolved completely. Step 6: Place the solution in the fridge remember it will take some time to cool the solution. When the solution is finally done cooling, it becomes super-cooled; hence, it has gone below its freezing temperature without actually freezing into a solid. (So cool!) Step 7: Add crystallized sodium acetate to aqueous solution; the powdered scrapings that were removed from the boiling pot. Begin with a small pinch; if no effect occurs add a larger portion. Step 8: adding solid sodium acetate to the cooled sodium acetate, causes a chain reaction to set off causing a solid to be formed. Final step: When placing hands near the outside of the container. It should radiate heat (the solid is 130°F or 54°C) because the formation of crystals releases energy. |
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