2006-09-18 18:21:09 · 7 answers · asked by jerioth w 1 in Science & Mathematics ➔ Chemistry
Both.
For physical change, at first, a ball of fire will float (due to low density of sodium) and move on the water at a very high speed and a colorless gas is released. The water will become soapy.
As for chemical change, the equation is shown below:
2Na + 2H2O ---> 2NaOH + H2
The water will become alkaline. This can be tested by litmus paper. As a result the color of the litmus paper is changed from red to blue.
Therefore, there can be physical and chemical change in this reaction.
2006-09-18 22:17:55 · answer #1 · answered by Ong 2 · 0⤊ 0⤋
this must be done in an anoxic chamber ( oxygen free) ; like a glass container filled with distilled H20, or a container in a chamber filled with a noble gas or CO2. The hydrogen released in fairly large quantity is a way to produce pure H2, and it isolates easily as it rises to the top of the chamber. NaOH is a very strong base with a number of industrial applications..
2Na + 2H2O => 2NaOH + H2 + heat OR
2Na + 2H2O + O => 2NaOH + H2O + heat(explosively)
2006-09-19 02:47:15 · answer #2 · answered by mr.phattphatt 5 · 0⤊ 0⤋
Sodium (English, soda). Sodium's symbol Na comes from de neo-Latin for a common sodium compound named natrium, which comes from the Greek nitron, a kind of natural salt. Sodium metal floats on water and reacts violently with it releasing heat, and depending on the mass of sodium used and the amount of agitation, this reaction may be explosive.
2006-09-19 02:21:25 · answer #3 · answered by Danko 2 · 0⤊ 2⤋
An explosion occurs, with hissing and fire from the top of the water as the sodium dances on top of the water due to its lighter density. The hydrogen that escapes as the sodium reduces the Water, catches on fire due to the energy of the process.
2Na + 2H20 -----------> 2NaOH + H2
2006-09-19 01:38:16 · answer #4 · answered by Anonymous · 0⤊ 1⤋
it will produce NaOH and H2 gas based on the formula:
2Na + 2H2O ----> 2NaOH + H2
this is highly exothermic reaction and if not done properly explosion will occur (not like that of a bomb, but sure it sounds)
best answer?
2006-09-19 05:04:32 · answer #5 · answered by teroy 4 · 0⤊ 0⤋
Well it's a chemical change that releases hydrogen as a gas. It WOULD sink, (it's not floating because it is less dense, as it is not less dense!) It is floating because the reaction is so powerful it doesn't have time to sink.
2006-09-19 02:39:47 · answer #6 · answered by MrZ 6 · 0⤊ 1⤋
chemical.
Na (s) + H2O --> NaOH+ 1/2H2
2006-09-19 01:25:00 · answer #7 · answered by chemmie_1 2 · 1⤊ 1⤋