by msander | May 23, 2019 | Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Chemistry
Everyone is self-conscious about having bad breath, but what about acid breath? Our science guy Steve Spangler puts on the lab coat to reveal the chemistry of your breath. Contact Steve Spangler at steve@stevespangler.com Contact Steve’s business manager at...
by msander | Oct 31, 2018 | Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Chemistry
The Alka-Seltzer tablets contain sodium bicarbonate and citric acid. As the Alka-Seltzer tablet dissolves in water, the citric acid reacts with the sodium bicarbonate to produce carbonic acid (Equation 1) and carbon dioxide (Equation 2). The carbonic acid then reacts...
by msander | Oct 12, 2018 | Gr 9-10 Science, Gr. 11-12 Chemistry
A candle and beaker of pink phenolphthalein solution are placed inside a jar. The candle is lit and the jar is capped. The flame expectedly goes out as the oxygen is depleted. After the flame is extinguished, the pink solution slowly fades to colourless. What has...
by msander | Apr 19, 2018 | Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Chemistry
Everyone is self-conscious about having bad breath, but what about acid breath? Our science guy Steve Spangler puts on the lab coat to reveal the chemistry of your breath. Contact Steve Spangler at steve@stevespangler.com Contact Steve’s business manager at...
by msander | Jan 29, 2018 | Gr. 11-12 Chemistry
This activity demonstrates the effect of pressure and temperature on three reversible reactions: the solubility of carbon dioxide in water, the reaction of dissolved carbon dioxide and water to form H2CO3, and the weak acid ionization of H2CO3 to give HCO3- and H+...
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