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  3. which of the following are redox reactions ? expla

Which of the following are redox reactions ? Explain your answer on the basis of changes in...

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Chemistry

Which of the followingare redox reactions ? Explain your answer on the basis of changesin oxidation number.

1. CuSO4 + 2NaOH → Cu(OH) 2 + Na2SO4

2. 2Al +3MgSO4 → 3Mg + Al2(SO4)3

3.2(NH4)3PO4 +3Ba(NO3)2 → Ba3(PO4)2 +6NH4NO3

4. 2HNO3 +3H3AsO3 → 2NO + 3H3AsO4 + H2O

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For the followingreaction, 4.57 g of silver nitrate are mixed with excess copper.The reaction yields 2.29 gram of copper(II) nitrate What is thepercent yield for this reaction?

Formula: % yield =(Actual yield/theoretical yield) x 100

2 AgNO3(aq)+ Cu(s) à Cu(NO3)2 (aq) + 2 Ag(s)

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