Law of mass conservation
This experiment tests the statement that during a chemical reaction the total mass of the system is conserved, even if chemical changes occur in the solution.
Lo que aprenden los alumnos
La base científica de este experimento
What happens to the total mass of a system during a chemical reaction? Do chemicals change their weight during reactions? Lavoisier's law of mass conservation states that the mass of reactants is equal to the mass of products.
Equipo utilizado
- Dropping pipette with teat — 1441.50+5448.00
- 2 × Glass beakers 50 ml — 1118.15
- Spatula, double ended — 5460.34
- Electronic balance — 2219.30
Productos químicos y reactivos
- Silver nitrate 0.1 M — R:34-50/53 S:26-45-60-61
- Potassium iodide 0.1 M — R:42/43-36/37/38 S:26-38
Notas de seguridad
Preguntas para los alumnos
- Describe what happens to the solution.
- What is the total weight of the two beakers plus the combined solution?
Qué puedes esperar
<p>When weighed again, it will be noted that the weight of the whole new system is equal to the weight of the initial system.</p><p>This confirms that the total mass is conserved, even though a chemical reaction has occurred.</p>
Eliminación
Dispose of the solution into the acids and bases 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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