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?

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