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An explosion, because the alkali metal react violently up when they touch water. When added to water the metal becomes a +1 ion, and the water forms OH- and H2 gas. The reaction with water is very exothermic, fast and violent. If a lump of lithium, sodium or potassium is placed in cold water, the metal floats; it may melt and move around the surface of the water with 'fizzing'. If universal indicator is added, it changes from green (pH 7) to purple (pH 13-14), showing an alkaline metal hydroxide was formed. The colourless gas hydrogen is also given off and pops with lit splint - but this is not the best of experiments to collect it from! The more reactive the metal, the more vigorous the reaction. Lithium and sodium do not normally cause a flame but the potassium reaction is exothermic enough to ignite the hydrogen. o 2H2(g) + O2(g) => 2H2O(l) o The hydrogen flame turns lilac due to hot potassium atoms in it. o Note: in flame tests hot lithium atoms give a crimson colour and sodium a yellow colour (more details). Rubidium, caesium and francium are very explosive with water. Down the group the reaction gets faster and more violent as the metal gets more reactive i.e. Li < Na < K < Rb < Cs < Fr. The reaction equation for sodium is in words and symbols... sodium + water ==> sodium hydroxide + hydrogen 2Na(s) + 2H2O(l) ==> 2NaOH(aq) + H2(g) and the equations are similar for any of the other Alkali Metals since they are in the same group of the Periodic Table, they behave chemically in the same way. Theoretically Francium is the most reactive and therefore the most explosive metal when in contact with water. See the Related Questions to the left for more information.
Also watch the linked videos of massive explosions due to sodium mixing with water! BOOM!!!
!!DBR!!
Wiki User
∙ 15y ago
When an alkali metal reacts with water, it produces an alkaline solution (hydroxide) and hydrogen gas as a byproduct. The alkali metal hydroxide formed will depend on the specific alkali metal used in the reaction.
Wiki User
∙ 10y agoAn alkali metal (such as Li, Na, K) reacts with cold water violently and exothermically to produce the alkali metal hydroxide and hydrogen gas. The heat produced from the reaction is sufficient to ignite the hydrogen gas, resulting in a flame around the metal.
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When an alkali metal reacts with water it produces what?
When an alkali metal reacts with water, it produces an alkali metal hydroxide and hydrogen gas. This is a highly exothermic reaction, with the alkali metal displacing hydrogen from the water molecule.
What happens when metal reacts with metal?
Alkali metals reacts violently with water forming a hydroxide and hydrogen; alkali earth metals react with water but no so violent.Other metals doesn't generally react with water at room temperature.
What metal reacts with water to cause an explosion?
there are some alkali metals. It can be sodium or potassium.
An alkali metal which reacts with water vigorously with water and sends sparks flying?
Lithium is an alkali metal that reacts vigorously with water, producing sparks due to the release of hydrogen gas. This reaction is highly exothermic, leading to the formation of lithium hydroxide and hydrogen gas.
What alkali metal reacts most slowly with water?
Among the alkali metals, lithium reacts most slowly with water. When lithium comes into contact with water, it forms lithium hydroxide and hydrogen gas. Due to lithium's smaller size and lower reactivity compared to other alkali metals, the reaction occurs at a slower rate.
When an alkali metal reacts with water it produces what?
When an alkali metal reacts with water, it produces an alkali metal hydroxide and hydrogen gas. This is a highly exothermic reaction, with the alkali metal displacing hydrogen from the water molecule.
What type of compound is produced when an acid reacts with an alkali?
When an acid reacts with an alkali, a salt and water are produced. This reaction is known as neutralization.
What happens when metal reacts with metal?
Alkali metals reacts violently with water forming a hydroxide and hydrogen; alkali earth metals react with water but no so violent.Other metals doesn't generally react with water at room temperature.
What reacts with an alkali to produce hydrogen gas?
When an alkali metal like sodium or potassium reacts with water, it produces hydrogen gas. This reaction is highly exothermic and can be violent. The alkali metal displaces hydrogen from water molecules, leading to the formation of hydrogen gas and the corresponding metal hydroxide.
What gas is produced when a metal and water react?
When a metal reacts with water, hydrogen gas is produced. This reaction typically occurs when a reactive metal, such as sodium or potassium, reacts with water to form the metal hydroxide and release hydrogen gas.
What metal reacts with water to cause an explosion?
there are some alkali metals. It can be sodium or potassium.
Which gas is always produced when a metal reacts with water?
Hydrogen gas (H2) is always produced when a metal reacts with water. When a metal reacts with water, it undergoes a redox reaction, where it loses electrons and is oxidized. The electrons are transferred to the oxygen atoms in the water molecules, which are reduced. The electrons released by the metal are used to break the O-H bonds in the water molecules, resulting in the formation of hydrogen gas. The balanced chemical equation for this reaction is: 2M + 2H2O → 2MO + H2 where M represents the metal.
An alkali metal which reacts with water vigorously with water and sends sparks flying?
Lithium is an alkali metal that reacts vigorously with water, producing sparks due to the release of hydrogen gas. This reaction is highly exothermic, leading to the formation of lithium hydroxide and hydrogen gas.
Metal that bursts into flames when it reacts in water?
I believe that you think to alkali metals (ex. sodium).
What does alkali form when it reacts with ammonia gas?
When an alkali metal (such as sodium or potassium) reacts with ammonia gas (NH3), it forms a complex called an amide. This reaction involves the alkali metal displacing hydrogen in ammonia to form metal amide and hydrogen gas.
What alkali metal reacts most slowly with water?
Among the alkali metals, lithium reacts most slowly with water. When lithium comes into contact with water, it forms lithium hydroxide and hydrogen gas. Due to lithium's smaller size and lower reactivity compared to other alkali metals, the reaction occurs at a slower rate.
What alkali is produced when sodium chloride is added to water?
Sodium chloride is dissociated in water in Na+ and Cl-. Sodium is an alkali metal.
