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Firefox File Edit View History Bookmarks Tools Window Help 37% D Tue 1:01 PM E Blackboard Hunter College X gH https://myacco...er orders.jsp x A ALEKS: Rong Li Kno... x search https://www-awu. aleks.com E Knowledge Check Question 7 JianRong Decide whether each chemical reaction in the table below is an oxidation-reduction ("redox reaction. If the reaction is a redox reaction, write down the formula of the reducing agent and the formula of the oxidizing agent redox reaction? yes AgNO (aq) Cucia (aq) 2Agcl (s) Cu (No1) (aq) reducing n X n 2 agent: oxidizing agent: redox reaction? yes reducing CuSO (aq) Zn (s) ZnSo4 a q) Cu (s) agent: oxidizing agent: redox reaction? yes reducing 302 (g) 4 2 2 3 Fe(s) agent: oxidizing agent: I Don't Know SubmitExplanation / Answer
1. Oxidation state of Ag in AgNO3 (reactant) = +1
Oxidation state of Ag in AgCl (product) = +1
the oxidation state of Ag in reactant and product is same.
So, it is not a redox reaction.
2. Oxidation state of Cu in CuSO4 (reactant)= +2
Oxidation state of Cu in Cu (product)= 0
Oxidation state of Zn in Zn (reactant)= 0
Oxidation state of Zn in ZnSO4 (product)= +2
So, the oxidation state is changing in reactants and products is different, so it is redox reaction.
Zn is being oxidised from 0 to +2 oxidation state, so it is reducing agent.
Cu is being reduced from +2 to 0, so it is oxidising agent.
3. Oxidation state of Fe in Fe (reactant)= 0
oxidation state of Fe in Fe2O3 (product)= +3
Oxidation state of O in O2 (reactant)= 0
Oxidation state of O in Fe2O3 (product)= -2
Oxidation state of Fe and O is changing, so it is redox reaction.
Fe is changing from 0 to +3, so it is reducing agent.
O is changing from 0 to -2, so it is oxidising agent.
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