180:100=1.8(1%)
1.8*60=108 грамм соли
180-108=72 грамма воды
1) P2O5 + 3H2O = 2H3PO4
2) H2SO4 + Ba(NO3)2 = BaSO4 + 2HNO3
2H[+] + SO4[2-] + Ba[2+] + 2NO3[-] = BaSO4 +2H[+] + 2NO3[-]
SO4[2-] + Ba[2+] = BaSO4
3) SO3 + Na2O = Na2SO4
<span>2AL+6H(+)=2AL(+3). + 3H2</span>
2Al+6HCl=2AlCl3+3H2
2Al+6H(+)+6Cl(-)=2Al(+3)+6Cl(-)+3H2
6. M(h3po3) = 82, M(naoh) = 40, M(na2co3) =106, M(al(hso4)3) =318,
M(znso4) =161
7. +7,-2; +4,-2; +4,-2; +2,-1; +1,-3; +7,-2; +1,-2; +2,-1; +4,-2; +3,-2;