4. Составьте уравнения возможных реакций между металлами и растворами кислот 1) Ca + HCl→________________________________________________ 2) Au +HBr→________________________________________________ 3) Na + H3PO4→______________________________________________ 4) Ag + HCl→________________________________________________ 5) Zn + HI→__________________________________________________ 6) Na + HI→_________________________________________________ 7) Al + HI→__________________________________________________ 8) Hg + HCl→________________________________________________ 9) Cu + HBr→________________________________________________
1) Ca + 2HCl = CaCl2 + H2; 2) 2Au + 2HBr = 2AuBr + H2 3) 6Na + 2H3PO4 = 2Na3PO4 + 3H2; 4) 2Ag + 2HCl = 2AgCl +H2; 5) Zn +2HI= ZnI2 + H2; 6) 2Na + 2HI = 2NaI + H2; 7) 2Al + 6HI = 2AlI3 = 2AlI3 + 3H2; 8) Hg + 2HCl = HgCl2 + H2; 9) 2Cu + HBr = 2CuBr + H2.
