why copper is not attacked by alkali ?
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Copper is generally immune from attack by caustic alkalis and not affected by contact with lime or calcium hydroxide. It can be safely embedded in fresh concrete with no disruptive action occurring even when the concrete is saturated, provided chlorides are not present
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Explanation:
Copper is easily electrolytically plated from an acid solution of Cu(SO)4, since it is below hydrogen on the electrochemical scale, or from an alkaline solution of potassium cuprocyanide, KCu(CN)2
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