Diffusion in a solution
Molecules and ions in a liquid are continuously moving, and this movement increases with temperature. This explains why solutes eventually become equally distributed through a solution even though the solvent remains stationary.
Lo que aprenden los alumnos
La base científica de este experimento
Molecules and ions in a liquid are continuously moving and this movement increases with increasing temperature.
Diffusion is the movement of matter in a system either liquid, solid or gaseous.
In a solid system the movements of molecules may be barely detectable, but in liquid or gaseous systems it is possible.
Equipo utilizado
- Test tubes — 1473.60
- Test tube rack — 1680.06
- Spatula — 5460.34
- Tweezers — 8261.30
Productos químicos y reactivos
- Potassium manganate (VII) (permanganate)
- Distilled water
Notas de seguridad
Preguntas para los alumnos
- Describe what happens as the crystal falls through the water and what happens when it comes to rest at the bottom of the test tube.
- What do you notice in the test tube as time goes by?
- Do you think the same phenomenon happens in gases? Give an example.
Qué puedes esperar
<p>As time goes by the very dark purple colour tends to diffuse into the remainder of the liquid and becomes less intense.</p><p>Diffusion also occurs in gases but is very much faster, the smoke of fires is an example.</p>
Eliminación
Dispose of the solution into the liquid waste container.
Realiza este experimento en tu clase
Este experimento forma parte del « Mobile Lab » de ATP, un laboratorio autónomo que convierte un aula normal en un laboratorio de ciencias en pleno funcionamiento, con más de 200 experimentos de física, química, biología, robótica e ingeniería. « Gali », el tutor de IA integrado en ATP Connect, guía a los alumnos paso a paso y responde a sus preguntas en la mesa de trabajo.
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