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Sodium hydroxide and hydrogen gas are produced in a very vigorous reaction which can even cause fire
it is always water.
Sodium hydroxide simply becomes ionized in water, no reaction will occur. And the concentration of NaOH will be reduced, if enough water is added.
The exothermic reaction of sodium peroxide and water is as follows: Na2O2(s) + 2 H2O(l) --> 2 NaOH(aq) + H2O2(aq) The hydrogen peroxide, H2O2, that is produced quickly decomposes into water and oxygen gas due to the catalyzing influence of sodium hydroxide, NaOH.
A solution of sodium thiosulfate is produced.
After the violent reaction of sodium with water hydrogen is released.
Sodium chloride is dissociated in water in Na+ and Cl-. Sodium is an alkali metal.
Endothermic
Sodium fizzes in water because it is undergoing a chemical reaction with water to form sodium hydroxide. The result is more stable than either of the original chemicals. When sodium chloride is added to water both of these substances are stable with respect to each other and no reaction occurs that results in a new chemical product.
Sodium hydroxide and hydrogen gas are produced in a very vigorous reaction which can even cause fire
hydrogen
Sodium chloride is soluble in water but don't react with water.
it is always water.
Sodium hydroxide simply becomes ionized in water, no reaction will occur. And the concentration of NaOH will be reduced, if enough water is added.
There is no chemical change at all. Adding salt to water makes salty water.
Sodium reacts with water. 0.652 NaOH moles will form.
It is a chemical change, as sodium cannot evaporate (or water go to water vapor) without added heat. The main gas produced in this highly exothermic chemical reaction is hydrogen, liberated from the water by the combination of a hydroxide radical (OH) with the sodium, yielding a sodium hydroxide (NaOH) solution. The heat released is typically sufficient to ignite and burn both the sodium and the released hydrogen. So pure sodium metal oddly appears to catch fire and burn when placed in water.