高一寒假限时108页9,为了检验某含有NaHCO3杂质的Na2CO3样品的纯度,现将ω1g样品加热,其质量变为ω2g,则该样品的纯度(质量分数)是A [84W2-53W1]\31W1 B 84[W1-W2]\31W1C [73W2-42W1]\31W1 D [115W2-84W1]\31W1
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 10:52:31
![高一寒假限时108页9,为了检验某含有NaHCO3杂质的Na2CO3样品的纯度,现将ω1g样品加热,其质量变为ω2g,则该样品的纯度(质量分数)是A [84W2-53W1]\31W1 B 84[W1-W2]\31W1C [73W2-42W1]\31W1 D [115W2-84W1]\31W1](/uploads/image/z/13761557-53-7.jpg?t=%E9%AB%98%E4%B8%80%E5%AF%92%E5%81%87%E9%99%90%E6%97%B6108%E9%A1%B59%2C%E4%B8%BA%E4%BA%86%E6%A3%80%E9%AA%8C%E6%9F%90%E5%90%AB%E6%9C%89NaHCO3%E6%9D%82%E8%B4%A8%E7%9A%84Na2CO3%E6%A0%B7%E5%93%81%E7%9A%84%E7%BA%AF%E5%BA%A6%2C%E7%8E%B0%E5%B0%86%CF%891g%E6%A0%B7%E5%93%81%E5%8A%A0%E7%83%AD%2C%E5%85%B6%E8%B4%A8%E9%87%8F%E5%8F%98%E4%B8%BA%CF%892g%2C%E5%88%99%E8%AF%A5%E6%A0%B7%E5%93%81%E7%9A%84%E7%BA%AF%E5%BA%A6%EF%BC%88%E8%B4%A8%E9%87%8F%E5%88%86%E6%95%B0%EF%BC%89%E6%98%AFA+%5B84W2-53W1%5D%5C31W1+B+84%5BW1-W2%5D%5C31W1C+%5B73W2-42W1%5D%5C31W1+D+%5B115W2-84W1%5D%5C31W1)
高一寒假限时108页9,为了检验某含有NaHCO3杂质的Na2CO3样品的纯度,现将ω1g样品加热,其质量变为ω2g,则该样品的纯度(质量分数)是A [84W2-53W1]\31W1 B 84[W1-W2]\31W1C [73W2-42W1]\31W1 D [115W2-84W1]\31W1
高一寒假限时108页9,为了检验某含有NaHCO3杂质的Na2CO3样品的纯度,现将ω1g样品加热,
其质量变为ω2g,则该样品的纯度(质量分数)是
A [84W2-53W1]\31W1 B 84[W1-W2]\31W1
C [73W2-42W1]\31W1 D [115W2-84W1]\31W1
高一寒假限时108页9,为了检验某含有NaHCO3杂质的Na2CO3样品的纯度,现将ω1g样品加热,其质量变为ω2g,则该样品的纯度(质量分数)是A [84W2-53W1]\31W1 B 84[W1-W2]\31W1C [73W2-42W1]\31W1 D [115W2-84W1]\31W1
2NaHCO3=加热=Na2CO3+H2O+CO2↑ 减少质量
84*2 18 44 62
x w1-w2
x=84(w1-w2)/31
纯度={ w1-84(w1-w2)/31}/w1 *1oo%= [84W2-53W1]\31W1