2006-09-27 23:34:19 · 12 answers · asked by jboxman7 2 in Science & Mathematics ➔ Chemistry
Melting NaCl would be a physical change because it would look different but the molecules are unchanged. Dissolving NaCl in water is a chemical change because the bonds between Na and Cl are broken (and become ionized). Electrolysis would even produce chlorine gas.
2006-09-27 23:56:07 · answer #1 · answered by Kes 7 · 0⤊ 0⤋
Dissolving NaCl in water is a physical change since there is no chemical reaction between and H2O(water). The Na+ and Cl- ions remain in the same state. Hence the dissolution is not a chemical change.
2006-09-28 06:45:24 · answer #2 · answered by Manindomb 2 · 0⤊ 0⤋
it is classified as physical change since the dissociation NaCl -> Na+ + Cl- is not considered a chemical reaction (the electron considered is closer to Cl than NA even while in NaCl form, therefore it's not a chemical reaction)
a chemical reaction is ALWAYS a reaction in which there is an electron moving from one atom to another. In this case, there are none.
2006-09-28 06:47:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It is a physical change. The molecules of NaCl are not changed in any way by the action of being dissolved (the NaCl reappears on evaporation) they are merely dispersed among the water molecules.
2006-09-28 06:45:38 · answer #4 · answered by U.K.Export 6 · 0⤊ 0⤋
It is a chemical change. Physical changes are the ones you could see, taste or smell. Chemical changes are the ones you can't exactly see with your eyes. Dissolving NaCl in water splits it up into Na^+ and Cl^0 ions. The result gives you NaOH and HCl.
2006-09-28 06:45:04 · answer #5 · answered by Harry thePotter 4 · 0⤊ 2⤋
dissolving means changing from (solid state to aqueous state) ( covalent bonds > ions) therefore NaCl in the dissolved state is a physical change
2006-09-28 06:50:37 · answer #6 · answered by Satan 2 · 0⤊ 0⤋
When NaCl(sodium chloride)(common salt) is dissolved in water, the compound gets seperated into sodium(Na) ions and Chlorine (Cl) ions. It is a physical change.
2006-09-28 06:50:14 · answer #7 · answered by Anurag S 2 · 0⤊ 0⤋
It's a physical change because a solution is technically a mixture, thus, the chemical properties do not change.
2006-09-28 07:06:28 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Phisical. NaCl and water can be seperated by boiling and cooling he steam in another beaker. Boiling and cooling are physical not chemical processes .
2006-09-28 06:45:03 · answer #9 · answered by J.SWAMY I ఇ జ స్వామి 7 · 0⤊ 1⤋
physical. If it was chemical there would have to be a reaction of some sort other then the disolvance
2006-09-28 06:50:29 · answer #10 · answered by Amy 2 · 0⤊ 0⤋