质量分数 = (100*10% + 200*40%) / (100+200) * 100% = 30%
设浓硫酸的质量为x
500*10% = x * 98%
解得x = 51.0 g
浓硫酸的质量 = 51.0 g.体积 = 51.0 / 1.84 = 27.7 mL
水的质量 = 500 - 51 = 449 g,体积 = 449/1 = 449 mL
需要浓硫酸和水各 27.7 mL、449 mL
质量分数 = (100*10% + 200*40%) / (100+200) * 100% = 30%
设浓硫酸的质量为x
500*10% = x * 98%
解得x = 51.0 g
浓硫酸的质量 = 51.0 g.体积 = 51.0 / 1.84 = 27.7 mL
水的质量 = 500 - 51 = 449 g,体积 = 449/1 = 449 mL
需要浓硫酸和水各 27.7 mL、449 mL