why do you think you can find silver and gold on their own in rocks but clacium and magnesuim are combined with othet elements to make compunds such as calcium carbonate and magnesium sulfate
Answers
Answer:
Silver and gold doesn't found on their own they are minerals like calcium and magnesium.
These can be obtained by mining activities from rocks and very interior in earth.
Calcium carbonate and magnesium sulfate are not minerals they are compunds of minerals which forms with the help of Many chemical activities and reactions.
Explanation:
I hope you will understand as my english is not very much good.......
In this experiment the soluble salts are magnesium sulfate and sodium carbonate, and the insoluble salt formed is magnesium carbonate, which can be filtered, dried and collected.
This is a short standard class experiment. It should take no more than 20 minutes to the point at which the wet product can be set aside to dry.
If the solutions can be provided in pre-measured 25 cm3 quantities in labelled containers, distribution of chemicals and control of quantities can be easily managed, and the practical work can begin without delay.
Sodium carbonate in dilute solution is weakly alkaline. So the few other safety issues are essentially restricted to safe handling of glassware. Even these can be minimised by the use of polythene filter funnels. This experiment is therefore suitable as a class experiment for most classes.