设与50g8%的氢氧化钠溶液恰好反应时盐酸中氯化氢的质量为x HCl+NaOH═NaCl+H2O 36.5   40x    40g×10%36.5x＝4040g×10%x=3.65g该盐酸溶液中溶质的质量分数是3.65g20g×10...