Question

Transformati: 600 grame de acid sulfuric = ? moli ; 2,5 moli acid clorhidric = ? grame;
16 moli hidroxid de calciu = ? grame ; 425 grame sulfat de aluminiu =? moli ; 500 grame sare de bucatarie = ? moli

Answer 1

600 grame H2SO4=? moli de H2SO4

mH2SO4=2+32+4*16=98 g/mol

n=m/M=600/98=6,1 moli de H2SO4

2,5 moli HCl=? grame

mHCl=35,5+1=36,5 g/mol

n=m/M=>m=n*M=2,5*36,5=91,25 g HCl

16 moli Ca(OH)2=? grame

m Ca(OH)2=40+32+2=74 g/mol

n=m/M=>m=16*74=1184 g Ca(OH)2

425 g Al2(SO4)3 =? moli

m Al2(SO4)3=342 g/mol

n=m/M=425/342=1,24 moli de Al2(SO4)3

500 g NaCl=? moli

m NaCl=58,5 g/mol

n=m/M=500/58,5=8,54 moli NaCl

Bafta!