ответ: 2)
H2SO4 = H[+] + HSO4[-]
HSO4[-] = H[+] + SO4[2-]
H2SO4 = 2H[+] + SO4[2-]
HBr = H[+] + Br[-]
ответ: 2)
H2SO4 = H[+] + HSO4[-]
HSO4[-] = H[+] + SO4[2-]
H2SO4 = 2H[+] + SO4[2-]
HBr = H[+] + Br[-]