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Let's look at the equation for the reaction of potassium and water:
Potassium + water --> potassium hydroxide + hydrogen
The reaction is fast and generates sufficient heat (it is exothermic) for the hydrogen gas produced to react with oxygen in the air. The presence of potassium gives the flame a lilac colour as the hydrogen burns.
In comparison, lithium and sodium are less reactive so the reactions are slower and produce less heat so the hydrogen gas produced does not ignite.
So, the potassium does not burn, the hydrogen does!
What else can I help you with?
When potassium and sodium are kept in open they catch fire why?
Metals such as potassium and sodium react so vigorously that they catch fire if kept in open.Hence,to protect them and to prevent their burning they are stored in kerosene as moisture cannot enter in it.
When sodium and potassium are kept in open air they catch fire?
When sodium and potassium are exposed to air, they react with the moisture in the air to form oxide compounds. This reaction generates heat, which can ignite the metal and cause it to catch fire. To prevent this, sodium and potassium are usually stored under mineral oil or kerosene to protect them from moisture in the air.
Can potassium dissolve in water?
Yes. potassium will dissolve in water forming potassium hydroxide and hydrogen gas. however, the reaction is very exothermic and will generally catch fire.
What do you get when you mix Potassium Sulfate with Ammonium Nitrate?
No reaction will occur between Potassium Sulfate and Ammonium Nitrate.
Difference between catch fire and catch ON fire?
Catch fire is a fictional term used in anime, and anime movies. Catch Fire means to catch fire, for example, you would catch a ball. Catching ON fire is lighting yourself on fire, or something else lighting you on fire. Big difference.
What happen when you put potassium in water?
Pure Potassium (K) will catch fire and may explode upon contact with water or very humid air.
When potassium and sodium are kept in open they catch fire why?
Metals such as potassium and sodium react so vigorously that they catch fire if kept in open.Hence,to protect them and to prevent their burning they are stored in kerosene as moisture cannot enter in it.
What causes a trunk to catch on fire?
bad wiring
Why shouldn't you get electrics wet?
Causes a discharge and can catch fire
When sodium and potassium are kept in open air they catch fire?
When sodium and potassium are exposed to air, they react with the moisture in the air to form oxide compounds. This reaction generates heat, which can ignite the metal and cause it to catch fire. To prevent this, sodium and potassium are usually stored under mineral oil or kerosene to protect them from moisture in the air.
What causes car to catch fire?
over heated or burning petrol
What causes the secret of surf?
with surf you can surf in the water in fire red you can catch a articuno
Catch on fire?
When somthing catches on fire the fire actually causes it to be on fire, like a nuke, for instance (i got a little crazy by saying nuke, i like explosions)
What temperature will make things catch on fire?
Most materials will catch fire at temperatures above 300°C (572°F), with some flammable materials igniting at lower temperatures. The exact temperature at which something will catch fire depends on the material and its flammability.
What causes dead people to catch fire?
The most common cause if usually PETROL and a MATCH!
What causes a car to catch on fire?
two things1the fuel in the fuel tank if you shoot the fuel tank it will catch on fire2 the battery if the two terminals stick together there will be a big bang in the trunk and it willl start to catch on fire
Can potassium dissolve in water?
Yes. potassium will dissolve in water forming potassium hydroxide and hydrogen gas. however, the reaction is very exothermic and will generally catch fire.
