Tell students that sometimes when two liquids are mixed, a solid forms. This solid is a new substance, and it’s called a precipitate. Explain that when substances are mixed and a new substance is ...

If you time how long it takes until you can no longer see the X due to the formation of the precipitate, you can calculate the rate using the equation. rate = 1 ÷ (time taken for X to be obscured ...

A few drops of dilute sodium hydroxide solution react to form a white precipitate with aluminium ions, calcium ions and magnesium ions. However, if excess sodium hydroxide solution is added ...