1.250ML质量分数为20%稀硫酸中硫酸的质量?
250mL × 1.14g/cm^3 × 20% = 57g
2.需要质量分数为98%的浓硫酸多少毫升?
57g ÷ 98% ÷ 1.84g/cm^3 = 31.6mL
需要加水多少克?
250mL × 1.14g/cm^3 - 57g ÷ 98% = 226.84g
1.250ML质量分数为20%稀硫酸中硫酸的质量?
250mL × 1.14g/cm^3 × 20% = 57g
2.需要质量分数为98%的浓硫酸多少毫升?
57g ÷ 98% ÷ 1.84g/cm^3 = 31.6mL
需要加水多少克?
250mL × 1.14g/cm^3 - 57g ÷ 98% = 226.84g