Chemists report that radiation-induced chemical reactions may help mitigate the corrosion of metals in a new type of nuclear reactor cooled by molten salts.

You filter the mixture to remove the excess base/carbonate/metal to obtain the pure salt solution. The pure solution can drip through the filter paper into the beaker below, leaving the insoluble ...

For example, copper does not react with dilute acids, so copper salts are made using copper oxide or copper carbonate, not copper metal. On the other hand, sodium is too reactive to be used safely ...