Oxygen in water
To demonstrate the presence of oxygen dissolved in water.
Lo que aprenden los alumnos
La base científica de este experimento
An important factor affecting germination is the oxygen concentration available to the seed. Sufficient oxygen must be present for cell respiration to provide adequate energy for germination, because germinating seeds are very metabolically active.
Respiration occurs during germination breaking down storage materials and sugars and converting them to other forms more useful to the seed.
Oxygen may be limiting in heavy soils such as clay or flooded conditions which in turn will affect seed germination. In the next experiment it will be shown how the lack of oxygen will lead germinating seeds to rot.
Equipo utilizado
- Iron stand — 5404.51
- Universal clamp — 5416.20
- Right angle clamp — 5401.16
- Glass tube 34×190 mm — 1464.51
- Glass delivery tube — 1468.02
- Rubber stopper with hole — 5450.75
- Large rubber stopper — 5450.12
- Connection for glass tube — 5449.43
- Mohr's clip — 5431.05
Productos químicos y reactivos
- Distilled water
- Vaseline
Notas de seguridad
Preguntas para los alumnos
- Observe and try to give an explanation.
Qué puedes esperar
<p>An evolution of some bubbles indicates the presence of air dissolved in the water.</p><p>Furthermore it indicates that the solubility of the gas depends on the pressure, as a matter of fact rising the small tube.</p>
Eliminación
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.
Consulta el Mobile LabHabla con nuestro equipo