precipitating out aluminum hydroxide. When additional base is added, the precipitate dissolves. The reactions can then be reversed with the addition of hydrochloric acid. The precipitate will reappear ...

For example, when magnesium reacts with hydrochloric acid, the salt magnesium chloride ... As you move down the reactivity series (aluminium, zinc, iron) the metals are less reactive, so less ...

He demonstrates how to electroplate a copper coin with zinc using a nail and dilute hydrochloric acid as the electrolyte ... including the extraction of aluminium from aluminium oxide and the ...