Element x forms a simple pink-colored substance with a metallic luster, which has a high electrical

| August 14, 2021 | education

Element x forms a simple pink-colored substance with a metallic luster, which has a high electrical conductivity. One of the oxides of this element is a black powder. What element are we talking about? How does the mentioned simple substance relate to: a) water b) hydrochloric acid c) nitric acid d) sodium hydroxide solution? Write down the equations of the reactions performed.

This is copper. The oxide in question is copper oxide 2. Copper does not react with water. It does not dissolve in acid solutions, since it is located to the right of hydrogen in the row of activity. But it dissolves in solutions of acid-oxidizing agents. Does not interact with sodium hydroxide solution.
2Cu + 4HCl (c) → 2H [CuCl2] + H2 (reaction occurs when heated)
3Cu + 8HNO3 (p) → 3Cu (NO3) 2 + 2NO2 + 2H2O
Cu + 4HNO3 (c) → Cu (NO3) 2 + 2NO2 + 2H2O



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