Science Source General Science

EN_90286235_0273

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caption

Potassium reacting with water. Potassium (symbol K) is a highly reactive metallic element of group one of the periodic table. It reacts with water to produce soluble potassium hydroxide (KOH) and hydrogen gas (H2). The reaction produces enough heat to ignite the hydrogen, which burns with a pink flame due to the presence of the potassium. The equation for the reaction is: 2K + 2H2O --- 2KOH + H2. The heat of the reaction also melts the potassium metal, which forms a molten ball that floats on the water's surface.

headline Science Source General Science

created date 2010-02-13

credit EAST NEWS

source Science Source

byline Charles D. Winters

original transmission reference 2v3310

weight 0,95MB

size 19cm x 28cm by 300dpi

keywords - Show

2H2O, 2K, ALIGHT, ALKALI, ALSO, AND, BALL, BURN, BURNING, BURNS, CHARLES, CHEMICAL, CHEMISTRY, DEMONSTRATION, DUE, ELEMENT, ENOUGH, EQUATION, EXOTHERMIC, EXPERIMENT, FIRE, FLAME, FLOATS, FOR, FORMS, GAS, GLASSWARE, GROUP, H2, HEAT, HIGHLY, HYDROGEN, HYDROXIDE, IGNITE, IS, IT, KOH, MELTS, METAL, METALLIC, MOLTEN, OF, ON, ONE, PERIODIC, PINK, POTASSIUM, PRESENCE, PRODUCE, PRODUCES, REACTING, REACTION, REACTIVE, REACTS, SCIENCE, SOLUBLE, SURFACE, SYMBOL, TABLE, THAT, THE, TO, WATER, WHICH, WINTERS, WITH,