Thursday, 16 May 2013

4.7 describe experiments to prepare soluble salts from acids

Dilute sulphuric acid is added to an excess of magnesium.
Mg + H2SO4 > MgSO4 + H2
The left over magnesium is filtered off and the mixture boiled down slowly to concentrate.
When it is cooled, crystals will form, these can be blotted dry with a piece of paper.

This can be done with other metals and acids:
Nitric, sulphuric and hydrochloric acids make soluble salts with most metals.
ammonium, potassium and sodium make soluble salts with acids


  1. Just to let you know, that sulphur, sulphates etc. have all been changed to an 'f' instead of 'ph' i.e. sulfur...

    It's stupid but it's changed ;-;

    1. The 'f' is the american spelling whereas the 'ph' is the english spelling

    2. england agreed to change it to 'f' and america agreed to change 'aluminum' to aluminium

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  4. No one minds which spelling you use. I've always used ph and no one has marked me down