Growing lead crystals

TL;DR

Crystals of lead metal can be grown by adding a piece of zinc to a solution of soluble lead salt, in a process known as the Tree of Saturn.

Transcript

A while ago I saw a cool video by the backyard scientist, and I decided to try it for myself. It's a very old and relatively simple experiment, but it's still quite interesting. When a piece of zinc is added to a solution of soluble lead salt, crystals of lead metal will start to form. Early chemists called this the tree of Saturn, because they bel... Read More

Key Insights

• 🥺 The Tree of Saturn experiment involves growing lead metal crystals using zinc and lead acetate.
• 🥺 Lead acetate acts as a spectator ion in the reaction, while zinc is oxidized and lead is reduced.
• 🥺 The lead crystals can be damaged by the formation of lead carbonate when exposed to air and moisture.
• 🥺 Attempts to protect and preserve the lead crystals using shellac or other methods have not been successful.
• 🥺 Keeping the lead crystals submerged in the lead acetate solution may help maintain their shine and structure.
• 🆘 Cleaning the zinc before the experiment helps remove oxides and carbonates from its surface.
• 🥺 The redox reaction between zinc and lead is responsible for the formation of lead metal crystals.

Questions & Answers

Q: What is the Tree of Saturn experiment?

The Tree of Saturn experiment involves adding zinc to a lead acetate solution to grow crystals of lead metal through a redox reaction.

Q: How does the redox reaction occur in the Tree of Saturn experiment?

The zinc is oxidized, losing two electrons to form zinc ions, while the lead ions in the solution are reduced, gaining the two electrons to form lead metal crystals.

Q: What causes the lead crystals to lose their shine?

The lead metal reacts with moisture and air to form lead carbonate, which deposits as a thin white layer on the surface, dulling its appearance.

Q: Can the lead crystals be preserved and protected?

Attempts to preserve the lead crystals using methods like shellac coating have been unsuccessful, as they react with air and lose their original structure.

Summary & Key Takeaways

• The Tree of Saturn experiment involves adding zinc to a solution of lead acetate to grow crystals of lead metal.

• The zinc is oxidized and the lead is reduced in a redox reaction, resulting in the formation of lead crystals.

• The lead crystals can be damaged by the formation of lead carbonate, but attempts to protect and preserve them have been unsuccessful.