Sunday, April 22, 2018

inorganic chemistry - Reaction between a vinegar/salt/hydrogen peroxide mixture as an etching solution and copper


I am looking for the less harmful chemical solution to serve as an etching solution. After many searches, my interest went to a vinegar/salt/hydrogen peroxide solution.


I have to ask then if the residue of this solution is harmful and if it is ok to pour it in the regular water waste system.




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...