Question

16. A small piece of silver was placed in a solution containing both magnesium nitrate and copper(II) nitrate.

Which one of the following will occur?

A No reaction occurs.

B The silver dissolves and only copper is precipitated.

C The silver dissolves and only magnesium is precipitated.

D A mixture of copper and magnesium forms on the silver.

Answer 1

I want to know how and why which answer is chosen. I need an explanation thanks.

Answer 2

I need help with another question, thanks.

An iron sculpture was produced to commemorate the anniversary of the founding of a small town. To stop it rusting, the mayor attached it by a wire to a block of zinc which was stored underground out of sight.

Explain how the mayor's action would prevent corrosion.

Why doesn't the iron actually have to be covered in zinc?

What would happen if a block of lead were to be attached to the iron rather than the block of zinc?

List two other ways in which corrosion of the statue could be prevented.

Answer 3

For the first question, I think it's about the displacement reaction as Ag forms soluble salt with nitrate. For displacement reaction, more reactive metal will displace less reactive metal from the solution. In your question, the reactivity of the metal are ranked as follows: Mg > Cu > Ag. Note that more reactive metals, that are Mg and Cu, are in the solution, do you think the displacement reaction can take place?

Answer 4

Compute the values of precipitation constants for each reactions and see if the value is greater than 1 for reactions,the reactions with highest value get precipitated fastest followed by other in decreasing order.

Answer 5

wait,sorry, I'm still kind of confused, can u explain it in more simple terms if possible?

Answer 6

Have you read something about chemical and ionic equilibrium then you would probably understand it better