The discussion focuses on the occurrence of specific chemical reactions involving sodium, nickel, copper, zinc, and their respective compounds. Reaction a) Na + HNO3 does not yield NaOH + NO2 under typical conditions, as sodium reacts with acids to produce hydrogen gas. Reaction b) Ni(II) + Cu2O does not balance in terms of charge or copper atoms, indicating it does not occur. Reaction c) Zn + Mg(NO3)2 is correctly identified as not occurring because zinc cannot displace magnesium from its salt due to its lower position in the activity series.
PREREQUISITESChemistry students, educators, and anyone interested in understanding chemical reactions and their mechanisms, particularly in the context of displacement reactions and the activity series of metals.
If Na does react with HNO3 (the question does not state if it's aqueous or anhydrous HNO3), this will not be the correct reaction. What happens when most metals react with an acid? Hint: Something is evolved.carla said:State "does not occur" if the reaction will not take place.
please let me know if i am right
a) Na + HNO3 ---> NaOH + NO2
This question too is ambiguous. Elemental Nickel has zero oxidation state (by definition, this is true for all elements), so one must only assume this is Ni2+ in aqueous solution. In that case, your equation clearly does not balance charge, nor does it balance the number of Cu atoms. But more importantly, you need to determine if the reaction will occur at all.b) Ni(II) + Cu2O --> Cu + NiO
This is correct, but do you know why?c) Zn + Mg(NO3)2 --> does not occur
Actually, a metal will react with a salt solution in many cases. For instance, what happens if you drop some Zinc pellets in a solution of CUSO4 (this reaction is the basis of the Galvanic cell)?carla said:reaction number 3 will not occur because magnesium nitrate is a salt and zinc is a metal and a metal and a salt cannot react