Question

A Salt is made by adding an excess of an insoluble metal oxide to an acid.
How is excess metal oxide removed?

is it by chromatography, crystallization, distillation or filtration

Answer 1

Answer:

filtration

Explanation:

metal oxide can be removed by filtration

Answer 2

Answer:

• filtration
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Explanation:

• Making a salt from an insoluble metal oxide or carbonate
• You add the base to the warm acid until no more will dissolve and you have some base left over – this is called an 'excess'. You filter the mixture to remove the excess base, and then evaporate the water in the filtrate to leave the salt behind.