Below shows 3 displacement reactions involving metals and solutions of metal nitrates.

Cu+2AgNO3->Cu(NO3)2+2Ag
Pb+Cu(NO3)2->Pb(NO3)2+Cu
Zn+Pb(NO3)2->Zn(NO3)2+Pb

Use this information to find the order of reactivity of the 4 metals, with the most reactive. I know their order but how do you use the information? How does the info help with the order of reactivity?

It tells which metal replaces which metal. If M displaces the ion of metal X then M goes above. If M does not displace X, M goes below. For example, Cu displaces Ag^+; therefore, Cu is above Ag in the activity series. Pb is above Cu. Zn is above Pb. You can make a table of these four.

To determine the order of reactivity of the metals, you can analyze the displacement reactions given. The general rule for displacement reactions is that a more reactive metal will displace a less reactive metal from its salt solution.

Let's go through the reactions step-by-step:

1. Cu + 2 AgNO3 -> Cu(NO3)2 + 2 Ag
In this reaction, copper (Cu) displaces silver (Ag) from its nitrate solution. This indicates that copper is more reactive than silver.

2. Pb + Cu(NO3)2 -> Pb(NO3)2 + Cu
Here, lead (Pb) displaces copper (Cu) from its nitrate solution. This implies that lead is more reactive than copper.

3. Zn + Pb(NO3)2 -> Zn(NO3)2 + Pb
In this reaction, zinc (Zn) displaces lead (Pb) from its nitrate solution. This suggests that zinc is more reactive than lead.

By analyzing these displacement reactions, we can conclude that the order of reactivity from most reactive to least reactive is as follows:

Zinc (Zn) > Lead (Pb) > Copper (Cu) > Silver (Ag)

Therefore, the most reactive metal among the given metals is zinc (Zn), and the least reactive is silver (Ag).

To determine the order of reactivity of the four metals (Cu, Pb, Zn, Ag), you can analyze the displacement reactions given. The observations from these reactions will allow you to compare the reactivity of the metals.

In displacement reactions, a more reactive metal displaces a less reactive metal from its salt solution. This means that if a reaction occurs, the more reactive metal will switch places with the less reactive metal in the solution.

Let's go through the given reactions one by one and analyze the observations to determine the order of reactivity:

1. Cu + 2AgNO3 -> Cu(NO3)2 + 2Ag:
In this reaction, copper (Cu) reacts with silver nitrate (AgNO3). A displacement occurs, and copper replaces silver in the solution. The observation is that a solid silver (Ag) forms, while the blue color of the copper nitrate solution fades.

2. Pb + Cu(NO3)2 -> Pb(NO3)2 + Cu:
In this reaction, lead (Pb) reacts with copper nitrate (Cu(NO3)2). A displacement occurs, and lead replaces copper in the solution. The observation is that a reddish-brown precipitate of lead (II) nitrate (Pb(NO3)2) forms, while the blue color of the copper nitrate solution fades.

3. Zn + Pb(NO3)2 -> Zn(NO3)2 + Pb:
In this reaction, zinc (Zn) reacts with lead nitrate (Pb(NO3)2). A displacement occurs, and zinc replaces lead in the solution. The observation is that a grayish-black precipitate of lead (Pb) forms, while the color of the zinc nitrate solution remains unchanged.

Now, based on the observations, you can determine the order of reactivity:

From the given reactions, we can see that copper (Cu) displaces silver (Ag) from silver nitrate (AgNO3) solution. Therefore, copper is more reactive than silver.

In the second reaction, lead (Pb) displaces copper (Cu) from copper nitrate (Cu(NO3)2) solution. Therefore, lead is more reactive than copper.

In the third reaction, zinc (Zn) displaces lead (Pb) from lead nitrate (Pb(NO3)2) solution. Therefore, zinc is more reactive than lead.

Hence, the order of reactivity, from most reactive to least reactive, is:
Zinc (Zn) > Lead (Pb) > Copper (Cu) > Silver (Ag).

By analyzing the observations of displacement reactions, you can determine the order of reactivity of the metals.