[Virginia Tech Department of Physics]

Lecture Demonstrations

Fluids
   

F22: Density Balls

 

Purpose: To show the change in density of water due to (a) a change in its salinity, and (b) a change in its temperature.

Description:

 

  1. Place a density ball in 60 grams/liter salt solution and watch it float; then place it in fresh water and watch it sink.
  2. Place a density ball in water at approximately 45oC. The ball sinks (specific gravity of water 0.990). Again, place the ball in water at a temperature of 15oC and watch it float (specific gravity of water 0.999).

See H09: Galileo's Thermometer for another similar demonstraton.

 

Equipment List: Storage Location: CHEMP 130A

 

Two density balls C4.4
  NaCl 60 grams/litre HAHN
  Three beakers H1

References:

Manual: None   Setup Notes: F22 PIRA #:
Manufacturer(s): Sargent-Welch Other school's Demonstration web pages

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