Question

sa se calculeze masa de dioxid de carbon care reactioneaza complet cu 500g de solutie de Ca(oh)2 de concetratie 3.7%
repede va rog am testt​

Answer 1

Ca(OH)₂+CO₂=CaCO₃+H₂O

m.substCa(OH)₂=m.soluţ.*w%/100%

m.substCa(OH)₂=500*3,7/100=18,5 g

M(Ca(OH)₂)=40+17*2=74 g/mol

γ=m/M=18,5/74=0,25 mol

γ(Ca(OH)₂)=γ(CO₂)=0,25 mol

M(CO₂)=12+16*2=44g/mol

m(CO₂)=γ*M=44*0,25=11 g