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Question asked by: Jennifer Lee - 4 months ago

Leg mij uitgebreid het volgende onderwerp uit: Vraag over reactievergelijkingen
Bij
H + Cl HCl
Links zijn er 2 H-atomen en 2 Cl-atomen.
Rechts bevat HCl maar 1 H en 1 Cl.

Daarom zet ik een 2 voor HCl:
H + Cl 2 HCl
Zo klopt het aantal atomen links en rechts.

Is dit altijd de juiste aanpak: eerst tellen, dan het product aanpassen zodat het aantal atomen klopt, en pas daarna controleren of de beginstoffen nog juist zijn?
En zijn er gevallen waarin deze methode niet werkt of anders moet? De uitleg moet geschreven zijn op het niveau van het Secundair onderwijs.

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