Kettles are usually made of metals such as iron and aluminum. What are two common substances that can be used as "scale remover" to remove scale on the inner wall of kettle?

When the aluminum pot is boiling water, put a spoonful of baking soda and boil for a few minutes to remove the scale. CaCO3+2NaHCO3=Ca(HCO3)2+Na2CO3 (acetic acid and aluminum have to react, so acetic acid is not used).

If the kettle has scale, you can put a few spoonfuls of vinegar into the water. After boiling, the scale can be removed by .2hac+CaCO3 = H2O+CO2 =+Ca (AC) 2.

The main component of scale is CaCO3.

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