Your Safer Source for Science
All-In-One Science Solution
Your Safer Source for Science
Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Email [email protected]

Ruby-Red Colloidal Gold Nanotechnology—Chemical Demonstration Kit

By: The Flinn Staff

Item #: AP7117 

Price: $43.32

In Stock.

Use the Ruby-Red Colloidal Gold Nanotechnology Chemistry Demonstration Kit to show what happens when solid particles “shrink” to a nanometer scale. Measure the absorption spectrum of colloidal gold to study properties of gold nanoparticles.

See more product details

This item can only be shipped to schools, museums and science centers

Product Details

Discover the beautiful properties of ruby-red colloidal gold in this introduction to nanotechnology demonstration. Reacting a very dilute solution of gold chloride in water with sodium citrate, a mild reducing agent, produces elemental gold. The gold particles are so small, 20 nanometers in diameter, that the “metallic” gold is uniformly dispersed in a stunning, transparent, ruby-red solution! Measure the visible absorption spectrum of colloidal gold to learn more about the optical properties of gold nanoparticles and their uses. Use this elegant demonstration to show what happens when solid particles “shrink” down to the nanometer scale, one-billionth of a meter.

Concepts: Nanotechnology, colloids vs. solutions, measurements.
Time Required: 20 minutes
Materials Provided: Hydrogen tetrachloroaurate (gold chloride) solution, trisodium citrate solution, sodium chloride solution, Beral-type pipets.


Materials Included in Kit: 
Hydrogen tetrachloroaurate (III) solution, 0.001 M, 150 mL
Sodium chloride solution, 1 M, 50 mL
Trisodium citrate solution, 1%, 25 mL
Pipet, Beral-type, graduated, 14

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Analyzing and interpreting data
Developing and using models
Planning and carrying out investigations

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS1.B: Chemical Reactions
MS-PS4.A: Wave Properties
MS-PS4.B: Electromagnetic Radiation
HS-PS1.A: Structure and Properties of Matter
HS-PS2.B: Types of Interactions

Crosscutting Concepts

Structure and function

Performance Expectations

MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
MS-PS4-2. Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
HS-PS1-3. Plan and conduct an investigation to gather evidence to compare the structure of substances at the bulk scale to infer the strength of electrical forces between particles.