The oxidation number goes from +6 in H2SO4 to +4 in SO2. Sulphate ion have an overall charge of 2- because the charge of Sulfur is 6+ here. the sulfate ion has a -2 charge. Lv 4. vor 4 Jahren. some times sulfur has the oxidation number 4+ like H2SO3. Oxidation number of Cu in CuSO4... Watch. The atomic number of copper is 29 and its electron configuration is 1s22s2 2p63s2 3p6 3d104s1 or 2, 8, 18, 1 electrons per shell. We could substitute in the of the sulphur and oxygen atoms, and apply the rule that in a compound the sum of all the oxidation numbers must come to zero. Snow Crystal Copper Sulfate. conclusion: oxidation number for some elements can differ from one compound to another. But nowhere in my lecture notes does it say anything regarding Cu or S? Oxidation number of Zn changes from 0 to +2, and the oxidation number of Cu goes from 2+ to 0. CuSO4 is a neutral molecule ... so the sum of the oxidation numbers is zero. THis means, Zn is undergoing oxidation or being oxidized or acting as an reducing agent. ... what is oxidation number Chemistry Calculations Redox multiple choice questions Helppp Ionic equation help please! What is the oxidation number (charge) of Copper in CuMnO4 ? so the oxidation number of Cu is +2. The oxidation number of copper depends on its state. Copper is an essential mineral that plays a key role in many physiological processes, including angiogenesis, skin generation and expression and stabilization of skin proteins. do u mean CuSO4 or ??? Brainliest, and I'll post free 50 points. It has gained electrons, so it is reduced. Cu2+ is the oxidising agent. Copper has potent biocidal properties and is used to eliminate bacteria, viruses and parasites [L1828], [L1839]. It is the reducing agent. In this case, the oxygen atoms have -2 oxidation number, and sulphur +6, so (4 x -2) + 6 = -2 so the copper must be +2. Remember the mnemonic "oil rig": oxidation is loss, reduction is gain. When copper forms a compound with the oxidation state +1, its molecular formula is different. Cu goes from ON. Cu is oxidized. Copper can also have oxidation numbers of +3 and +4.. ON = +2: Examples are CuCl₂, CuO, and CuSO₄.See, for example +2 to 0. It has lost electrons, so it is oxidised. 5H 2 O), the most commonly encountered salt, is bright blue. In its compounds, the most common oxidation number of Cu is +2.Less common is +1. 1 word HELP, please! Add your answer and earn points. Fe goes from oxidation number 0 to +2. to balance that Cu has to have a +2 charge. Identify which reactants are being oxidized (the oxidation number increases when it reacts) and which are being reduced (the oxidation number goes down). The oxidation number goes from 0 in Cu to +2 in CuSO4. New questions in Chemistry. jurneenelson22 is waiting for your help. 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