The chemical formula for granulated zinc is Zn.
Granulated zinc is a form of elemental zinc metal (atomic number 30) that has been processed into small, irregular particles or granules. Despite its specific physical form, its chemical composition remains that of pure zinc.
Understanding Granulated Zinc
Granulated zinc is essentially pure zinc metal. The term "granulated" refers to its physical state, meaning it exists as small grains or granules, which increases its surface area. This form is particularly useful in laboratory settings and industrial applications where a higher reaction rate or easier handling is desired compared to larger ingots or sheets of zinc.
For instance, the specific product referred to is "ZINC METAL GRANULAR 99.9% AR," indicating a very high purity of 99.9% and an "Analytical Reagent" (AR) grade, suitable for precise laboratory work.
Key Properties of Zinc (Zn)
As an element, zinc possesses distinct chemical and physical properties:
- Atomic Structure: Each particle of granulated zinc is composed of countless zinc atoms, each containing 30 protons, 30 electrons, and typically 35 neutrons (for the most common isotope, Zn-65).
- Metallic Bonds: Zinc atoms are held together by metallic bonds, characteristic of metals, giving it properties like electrical conductivity, malleability, and a relatively high melting point.
- Reactivity: Zinc is a reactive metal that readily oxidizes in air to form a protective layer of zinc oxide (ZnO), which prevents further corrosion—a process known as passivation. It also reacts with acids to produce hydrogen gas.
Table of Key Characteristics for Granulated Zinc (99.9% AR Grade)
| Property | Value |
|---|---|
| Chemical Formula | Zn |
| Molecular Weight | 65.37 g/mol |
| Purity (Typical) | 99.9% |
| Grade | Analytical Reagent (AR) |
| Physical Form | Granular |
| Shelf Life (Typical) | 5 years |
| Appearance | Silvery-white, lustrous |
Applications of Granulated Zinc
Due to its high purity, specific form, and chemical reactivity, granulated zinc finds numerous applications across various industries:
- Laboratory Reagent: It is widely used in chemical laboratories for experiments, reductions, and the preparation of hydrogen gas by reacting with acids.
- Metallurgy: In alloys like brass (zinc and copper) and bronze (zinc, copper, and tin), zinc improves strength and castability.
- Galvanization: While typically large sheets of zinc are used, the principle of zinc's protective properties is key in galvanizing steel to prevent rust.
- Batteries: Zinc serves as an anode in various battery types, including zinc-carbon and alkaline batteries.
- Chemical Synthesis: Used as a reducing agent in organic chemistry and in the production of other zinc compounds.
For further information on the element zinc and its various forms, you can explore resources like Wikipedia's entry on Zinc.
