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Copper and silver metals are commonly used as coin because they are
Cu\(^{2+}\)(aq) + 4NH\(_3\)(g) ↔ [Cu(NH\(_3\))\(_4\)]\(^{2+}\)(aq)
In the reaction above, what is the effect of precipitating Cu\(^{2+}\)(aq) as CuS(s)?
The tincture of iodine means iodine dissolved in
Na\(_2\)S\(_2\)O\(_3\)(aq) + 2HCl(aq) → 2NaCl(aq) + H\(_2\)O(l)
Which of the following would introduce the greatest increase in the rate of the chemical reaction above?
The reddish-brown rust on iron roofing sheets consists of
The soft solder used for welding and plumbing is alloy of
A solution which on treatment with hydrochloric acid produces a colourless, odourless gas which turns lime water milky is most likely to be a
When calcium oxide is heated with carbon, the oxide will
An element used in the production of matches is
Trioxonitrate (V) acid is not used for preparing hydrogen gas from metals because it