Proust's law

Exercise


 
The compound zinc chloride contains two elements. Which?

 

Zinc (Zn) and chlorine (Cl).

 


  Deduce Proust's law from the following tables:
 


 
m(ZnCl2)m(Zn)m(Cl)
1,04 g 0,50 g 0,54 g 
2,08 g 1,00 g 1,08 g 
3,12 g 1,50 g 1,62 g 

 

m(ZnCl2)m(Zn)m(Cl)m(Cl)/m(Zn)
1,04 g 0,50 g 0,54 g 1,08 g 
2,08 g g 1,00 g 1,08 g 1,08 g 
3,12 g 1,50 g 1,62 g 1,08 g 

The ratio m(Cl)/m(Zn) remains always constant (Proust!)