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💍inorganic chemistry ii review

Lead molybdate

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Lead molybdate is an inorganic compound with the formula PbMoO$_4$, known for its vibrant yellow color and used primarily as a pigment. This compound serves as a significant example of inorganic pigments, showcasing how metal oxides can produce vivid colors that are stable and durable, making it ideal for various applications, including paints and coatings.

5 Must Know Facts For Your Next Test

  1. Lead molybdate is often referred to as 'chrome yellow' due to its bright yellow appearance, making it popular in artistic and industrial applications.
  2. The compound is insoluble in water, contributing to its stability and durability when used as a pigment in various media.
  3. Lead molybdate is a part of a larger group of lead-based pigments that have been restricted or banned in many countries due to health concerns associated with lead exposure.
  4. When mixed with other compounds, lead molybdate can produce a range of shades, expanding its versatility in applications beyond simple yellow hues.
  5. Despite its appealing color properties, the environmental impact and toxicity of lead molybdate have led to increased research into safer alternatives in pigment production.

Review Questions

  • What are the main characteristics of lead molybdate that make it suitable for use as an inorganic pigment?
    • Lead molybdate is valued as an inorganic pigment due to its vibrant yellow color, excellent lightfastness, and chemical stability. Its insolubility in water ensures that it remains intact in various applications, such as paints and coatings. Additionally, the ability to mix it with other compounds allows for the creation of a broader spectrum of colors while retaining the essential properties that make it durable.
  • Discuss the health and environmental concerns associated with the use of lead molybdate in industrial applications.
    • The primary concern with lead molybdate revolves around its lead content, which poses significant health risks through exposure. Lead is a known toxic metal that can accumulate in the body, leading to serious health issues such as neurological damage and developmental problems. Consequently, many regions have implemented regulations restricting the use of lead-based pigments like lead molybdate to protect public health and mitigate environmental contamination.
  • Evaluate the impact of advancements in pigment technology on the future use of lead molybdate in various industries.
    • Advancements in pigment technology are increasingly leading to the development of safer and more environmentally friendly alternatives to traditional pigments like lead molybdate. The rise of organic pigments and non-toxic inorganic options offers industries a way to achieve similar color vibrancy without the associated health risks. This shift not only impacts the market demand for lead molybdate but also encourages further innovation towards sustainable practices in pigment production, ultimately reshaping industry standards regarding safety and environmental responsibility.