ms₁= 200gsol HCl
c₁=30% c₁=md₁/msx100 md₁=c₁xms/100 md₁=30x200/100
md₁=60g HCl
106 2x36,5 2x58,5
Na₂CO₃ + 2HCl → 2NaCl + H₂O +CO₃↑ Acidul carbonic se descompune in x 60g y apa si dioxid de carbon care se degaja.
x= 106x60/73 x=87,12gNa₂CO₃ este md₂
y= 60x117/73 y=96,16g NaCl
Calculam masa solutei de carbonat
c₂ =md₂/ms₂x100 ms₂ =mdx100/c ms₂ =145,2g sol Na2CO3
Raspuns corect :c