ketchup - the vinegar ( acetic acid ) in ketchup changes the copper oxide to copper acetate which is soluable in water.
Copper oxidation is endothermic.
The oxidation state of the cupric ion in copper tartarate is +2. Copper (II) ion, or cupric ion, has an oxidation state of +2 due to the loss of 2 electrons. In the case of copper tartarate, the ligand (tartarate) does not affect the oxidation state of the central copper ion.
It is not possible to reverse engineer copper. Copper is a basic element.
It depends on the compound. +1 and +2 are the more common ones (as in Cu2I2 and CuI2 respectively). In elemental form, its oxidation number is zero.
CuCl is copper (I) chloride, where copper has a +1 oxidation state. Cu2Cl2 is copper (II) chloride, where copper has a +2 oxidation state. The difference lies in the oxidation state of copper present in the compounds.
If the question is Cu2, then it is equivalent to Cu and the oxidation number for any element is zero. If the question is Cu2+, then the oxidation number is +2.
+2 oxidation state for the Copper. -1 for the Chloride
Copper iodide has a chemical formula of CuI. In this compound, the oxidation number of copper is +1.
The common oxidation states for copper are +1 and +2. However, copper can exhibit other oxidation states such as +3 and even +4 in some rare cases.
The formula for copper(I) chloride is CuCl, where copper has a +1 oxidation state. The formula for copper(II) chloride is CuCl2, where copper has a +2 oxidation state.
No, the oxidation of copper is not exothermic. It is an endothermic process, meaning it absorbs heat from its surroundings as it occurs.
The oxidation number of copper in CuNH3Cl2NO3 is +1. This is because the overall charge of the complex ion is -1, and the oxidation numbers of N, H, Cl, and O remain the same as their typical values, leaving copper with a +1 oxidation state to balance the charge.