2HgO --> 2Hg + O2
Hg + AgNO3 --> HgNO3 + Ag
Ag + 2HNO3 --> AgNO3 + NO2 + H2O
O2 + 2H2 --> 2H2O
c)
100% ...................... 325,5g HgO impur
80% ..................... m = 260,4 g HgO pur
M.HgO = 201+16 = 217 g/mol
M.HNO3 = 1+14+3x16 = 63 g/mol
260,4g a moli
2HgO --> 2Hg + O2
2x217 2
=> a = 260,4x2/2x217 = 1,2 moli Hg
1,2 moli b moli
Hg + 2AgNO3 --> Hg(NO3)2 + 2Ag
1 2
=> b = 1,2x2/1 = 2,4 moli Ag
2,4 moli md g
Ag + 2HNO3 --> AgNO3 + NO2 + H2O
1 2x63
=> md = 2,4x2x63/1 = 302,4 g HNO3
di c% = mdx100/ms
=> ms = mdx100/c% = 302,4x100/63 = 480 g sol. HNO3
din p = ms/Vs => Vs = ms/p
= 480/1,39 = 345,32 cm3 sol. HNO3
