Is this a chemical or a physical change?
OKay so i had a Copper(II) sulfate, distilled water & steel wool solution.
I add 5 drops of Sodium hydroxide solution.
That created a precipitate of yellowy-brown particles.
Then I add Hydrochloric acid. The precipitate sinks, and eventually, with more and more hydrochloric acid, disappears.
Now, is this a chemical or physical change? I’d say chemical because the precipitate was formed, but it was easily reversed, so what is it?
now would you say that i could easily reverse this chemical change?