The Activity Series | Pathways to Chemistry - Free Printable

Actually, you did not upload an image with a specific task or question — you provided a *description* of an image titled “Partial Activity Series of Metals”, which is a standard chemistry reference chart.

Since no explicit question was asked (e.g., “Which metal will displace copper from solution?” or “Why is hydrogen included in the series?”), I’ll assume you want:

> ✔ An explanation of what this chart is, how to read it, and how to use it to predict chemical reactions.

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## 🧪 What Is the Activity Series of Metals?

The Activity Series of Metals (also called the Electrochemical Series or Reactivity Series) ranks metals (and hydrogen) in order of their reducing strength — that is, their tendency to lose electrons and be oxidized.

- The higher a metal is on the list, the more reactive it is.
- The lower a metal is, the less reactive it is (more noble).

Hydrogen (H₂) is included as a reference point because many reactions involve acids (H⁺ ions).

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## 🔼 How to Read the Chart

- Arrow pointing up = Increasing Reducing Strength
- So, Lithium (Li) at the top is the strongest reducing agent (most easily oxidized).
- Gold (Au) at the bottom is the weakest reducing agent (hardest to oxidize).

- Each entry shows the oxidation half-reaction:
`Metal(s) → Metalⁿ⁺(aq) + n e⁻`

- Groupings indicate reaction behavior with acids or water:
1. Top group (Li to Na): React vigorously with H⁺(aq) *or even water* to produce H₂(g).
2. Middle group (Mg to Cr): React with H⁺(aq) *or steam* to form H₂(g).
3. Lower middle (Fe to Sn): React with H⁺(aq) to form H₂(g) — but more slowly or under specific conditions.
4. Bottom group (Cu to Au): Do NOT react with H⁺(aq) to form H₂(g). These are “noble” metals.

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## 💡 How to Use It: Predicting Single Replacement Reactions

The key rule:

> A metal can displace (reduce) the ion of any metal below it in the series.

In other words:
> A more active metal (higher on the list) will displace a less active metal ion (lower on the list) from solution.

Example 1: Will Zn displace Cu²⁺?

- Zn is above Cu → YES
- Reaction:
`Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)` ✔ Spontaneous

Example 2: Will Cu displace Zn²⁺?

- Cu is below Zn → NO
`Cu(s) + Zn²⁺(aq) → No reaction` ✘ Not spontaneous

Example 3: Will Mg react with HCl?

- Mg is above H₂ → YES
`Mg(s) + 2H⁺(aq) → Mg²⁺(aq) + H₂(g)` ✔

Example 4: Will Ag react with HCl?

- Ag is below H₂ → NO
`Ag(s) + H⁺(aq) → No reaction` ✘

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## ⚠️ Important Notes

- Hydrogen is not a metal, but it’s placed in the series to compare reactivity with acids.
- Metals above H₂ react with dilute acids to produce H₂ gas.
- Metals below H₂ do not — they’re often used in jewelry or electronics because they don’t corrode easily.
- This series also predicts corrosion tendencies and battery electrode behavior.

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## 📌 Summary Table for Quick Reference

| Metal Position | Reacts with Water? | Reacts with Acid (H⁺)? | Can Displace Lower Metals? |
|------------------------|--------------------|-------------------------|----------------------------|
| Top (Li, K, Ba, Ca, Na)| Yes (vigorous) | Yes | Yes |
| Middle (Mg to Cr) | No (but with steam)| Yes | Yes |
| Below H₂ (Fe to Sn) | No | Yes (slowly) | Yes |
| Bottom (Cu to Au) | No | No | No |

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## ❓ If You Had a Specific Question…

If your original intent was to ask something like:

> “Will iron react with silver nitrate?”

→ Answer: Yes, because Fe is above Ag → `Fe(s) + 2Ag⁺(aq) → Fe²⁺(aq) + 2Ag(s)`

> “Can copper displace zinc from zinc sulfate?”

→ Answer: No, because Cu is below Zn → no reaction.

> “Why is hydrogen included?”

→ To serve as a benchmark for acid reactivity.

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✔ Let me know if you have a specific problem you’d like solved using this chart — just describe it or paste the text! I’m ready to help.

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📌 Final Tip: Memorize the order from Li to Au — or at least remember the cutoff at H₂. That’s enough for most high school/college chemistry problems!