Worksheet on reactivity series and displacement reactions, featuring tasks to predict and complete chemical reactions using the reactivity series.

It looks like you've uploaded a worksheet titled "Reactivity series and displacement reactions" with two tasks related to predicting chemical reactions based on the reactivity series of metals.

Since I can't view images directly, I’ll help you solve the problems based on the text you provided, assuming this is the full content of the image. Let's go step by step.

---

🔬 Task 1: Use the reactivity series to predict the following reactions

We need to determine whether a reaction will occur when a metal is placed in a solution of another metal’s salt. A more reactive metal can displace a less reactive metal from its compound.

Here’s the standard reactivity series (from most to least reactive):

> Potassium > Sodium > Calcium > Magnesium > Aluminium > Zinc > Iron > Lead > Copper > Silver > Gold

Now let’s analyze each reaction:

---

#### 1. copper oxide + magnesium →

- Magnesium is more reactive than copper.
- So, magnesium can reduce copper oxide to copper.
- Reaction occurs:
\[
\text{Mg} + \text{CuO} \rightarrow \text{MgO} + \text{Cu}
\]
✔ Yes, reaction takes place.

---

#### 2. copper + tin →

- Both are metals; no compound involved.
- Tin is more reactive than copper (Tin is above copper in the series).
- But since both are solid metals, no displacement reaction occurs.
- Metals don’t react with each other just by mixing solids unless heated or in molten form.
- No reaction.

✘ No, reaction does not take place.

---

#### 3. lead chloride + iron →

- Iron is more reactive than lead.
- Iron can displace lead from lead chloride.
- Reaction:
\[
\text{Fe} + \text{PbCl}_2 \rightarrow \text{FeCl}_2 + \text{Pb}
\]
✔ Yes, reaction takes place.

---

#### 4. copper sulphate + calcium →

- Calcium is much more reactive than copper.
- Calcium displaces copper from copper sulfate.
- Reaction:
\[
\text{Ca} + \text{CuSO}_4 \rightarrow \text{CaSO}_4 + \text{Cu}
\]
✔ Yes, reaction takes place.

---

#### 5. aluminum + silver chloride →

- Aluminum is more reactive than silver.
- Aluminum displaces silver from silver chloride.
- Reaction:
\[
2\text{Al} + 3\text{AgCl} \rightarrow 2\text{AlCl}_3 + 3\text{Ag}
\]
✔ Yes, reaction takes place.

---

#### 6. iron nails + sodium →

- Sodium is more reactive than iron.
- But sodium is a highly reactive metal that reacts violently with water, and if iron nails are wet, it may react with moisture.
- However, sodium doesn’t displace iron from iron nails because iron is not in ionic form here — it’s already metallic.
- No ionic compound present for displacement.
- Also, sodium would react with air/water first.
- ✘ No, reaction does not take place (not a displacement reaction under normal conditions).

---

✔ Summary for Task 1:

| Reaction | Will it happen? |
|--------|----------------|
| 1. copper oxide + magnesium | ✔ Yes |
| 2. copper + tin | ✘ No |
| 3. lead chloride + iron | ✔ Yes |
| 4. copper sulphate + calcium | ✔ Yes |
| 5. aluminum + silver chloride | ✔ Yes |
| 6. iron nails + sodium | ✘ No |

---

🔬 Task 2: Complete the reactions that will take place, put a cross by those that will not

Let’s go through each:

---

#### 1. aluminium + zinc chloride →

- Aluminum is more reactive than zinc.
- Aluminum displaces zinc:
\[
2\text{Al} + 3\text{ZnCl}_2 \rightarrow 2\text{AlCl}_3 + 3\text{Zn}
\]
✔ Yes, reaction occurs.

---

#### 2. sodium chloride + aluminium →

- Sodium is more reactive than aluminum.
- But sodium is in ionic form (Na⁺), and aluminum cannot displace sodium from its salt.
- Aluminum is less reactive than sodium.
- So, no reaction.
✘ No, reaction does not occur.

---

#### 3. calcium + copper →

- Both are solid metals.
- No compound involved.
- Calcium is more reactive, but no displacement possible without a compound.
- ✘ No, reaction does not occur.

---

#### 4. magnesium + silver nitrate →

- Magnesium is more reactive than silver.
- Magnesium displaces silver:
\[
\text{Mg} + 2\text{AgNO}_3 \rightarrow \text{Mg(NO}_3)_2 + 2\text{Ag}
\]
✔ Yes, reaction occurs.

---

✔ Summary for Task 2:

| Reaction | Will it happen? |
|--------|----------------|
| 1. aluminium + zinc chloride | ✔ Yes |
| 2. sodium chloride + aluminium | ✘ No |
| 3. calcium + copper | ✘ No |
| 4. magnesium + silver nitrate | ✔ Yes |

---

📝 Final Answer:

#### Task 1:
1. ✔ Yes
2. ✘ No
3. ✔ Yes
4. ✔ Yes
5. ✔ Yes
6. ✘ No

#### Task 2:
1. ✔ Yes → \( 2\text{Al} + 3\text{ZnCl}_2 \rightarrow 2\text{AlCl}_3 + 3\text{Zn} \)
2. ✘ No
3. ✘ No
4. ✔ Yes → \( \text{Mg} + 2\text{AgNO}_3 \rightarrow \text{Mg(NO}_3)_2 + 2\text{Ag} \)

---

💡 Key Concept Reminder:

> A metal higher in the reactivity series can displace a metal lower in the series from its compound (salt). It cannot displace a more reactive metal, and solid-metal mixtures do not undergo displacement unless one is in ionic form.

Let me know if you'd like these answers formatted for printing or want explanations with diagrams!