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

7 comments:

  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 ;-;

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

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

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  2. This comment has been removed by the author.

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  3. This comment has been removed by the author.

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

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