ZnCl2 + 2NaOH = Zn(OH)2 + 2NaCl ZnCl2 = 65 + 35.5 * 2 = 136 гр 2NaOH = 2 * (23+16+1)=80гр Zn(OH)2 = 65 + 17 * 2 =99гр ZnCl2 = 136гр --- 200 гр 2NaOH = 80гр --- x = (80 * 200) : 136 = 117,65 гр Zn(OH)2 = 99гр --- y = (99 * 200) : 136 = 145,59 гр Ответ: NaOH = 117.65гр и Zn(OH)2 = 145.59 = 145.6 гр