a substance dissolve in an acid producing a gas. is this a physical change or chemical change. explain,,,
2007-06-10 13:54:05 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Both. The physical state of whatever was dissolved has changed and the gas produced is a chemical change.
2007-06-10 13:58:42 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Chemical change. The gas has to come from somewhere. It came from a chemical reaction. Amaze your teacher! Tell her that the substance was sodium borohydride, NaBH4. It dissolved in an acid to produce a gas:
NaBH4 + HCl(aq) + 3H2O ===> H3BO3 + NaCl + 4H2
2007-06-10 21:03:45 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋
As the substance (and the acid), has changed chemically it's a chemical change.
2007-06-10 20:58:43 · answer #3 · answered by Norrie 7 · 2⤊ 0⤋
One of us is smart enough, yes. Save the drama for your mama. Get down and PUSH. Ignorance is not a form of knowing things.
2007-06-10 20:57:35 · answer #4 · answered by Uncle Al 5 · 1⤊ 1⤋