Question

Calculați compoziția procentuala pentru acid fosforic (H3) , acid fosforos, H2Po4 vaaa roogg ajuttooorr
Dau coroana !!!

Answer 1

H3PO3
MH3PO3=3+31+3.16=82

82gH3PO3-----3gH-------31gP------48gO
100gH3PO3-----xg---------yg-----------zg

x=100.3:82=3,65 la suta H
Y=100.31:82=37,8 la suta P
Z=100.48:82=58,5 la suta O


H3PO4
MH3PO4=3+31+4.16=98
98 g H3PO4-------3gH------31gP------64 gO
100gH3PO4-------Xg-----------Yg-------zg
x=100.3:98=3,06 la suta H
Y=100.31:98=31,6 la suta P
Z=100.64:98=65,3 la sutaO