1.欲配置1.0 mol•L-1的硝酸溶液0.5 L,需取用ρ =1.48 g•cm-3,68 %的浓硝酸多少毫升?( )1.欲配置1.0 mol·L-1的硝酸溶液0.5 L,需取用ρ =1.48 g·cm-3,68 %的浓硝酸多少毫升?( )A.31.3 mL B.62.6 mL C.15.7 mL D.46.8
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![1.欲配置1.0 mol•L-1的硝酸溶液0.5 L,需取用ρ =1.48 g•cm-3,68 %的浓硝酸多少毫升?( )1.欲配置1.0 mol·L-1的硝酸溶液0.5 L,需取用ρ =1.48 g·cm-3,68 %的浓硝酸多少毫升?( )A.31.3 mL B.62.6 mL C.15.7 mL D.46.8](/uploads/image/z/7658464-40-4.jpg?t=1.%E6%AC%B2%E9%85%8D%E7%BD%AE1.0+mol%26%238226%3BL-1%E7%9A%84%E7%A1%9D%E9%85%B8%E6%BA%B6%E6%B6%B20.5+L%2C%E9%9C%80%E5%8F%96%E7%94%A8%CF%81+%3D1.48+g%26%238226%3Bcm-3%2C68+%25%E7%9A%84%E6%B5%93%E7%A1%9D%E9%85%B8%E5%A4%9A%E5%B0%91%E6%AF%AB%E5%8D%87%3F%28+%291.%E6%AC%B2%E9%85%8D%E7%BD%AE1.0+mol%C2%B7L-1%E7%9A%84%E7%A1%9D%E9%85%B8%E6%BA%B6%E6%B6%B20.5+L%2C%E9%9C%80%E5%8F%96%E7%94%A8%CF%81+%3D1.48+g%C2%B7cm-3%2C68+%25%E7%9A%84%E6%B5%93%E7%A1%9D%E9%85%B8%E5%A4%9A%E5%B0%91%E6%AF%AB%E5%8D%87%3F%28+%29A.31.3+mL+B.62.6+mL+C.15.7+mL+D.46.8)
1.欲配置1.0 mol•L-1的硝酸溶液0.5 L,需取用ρ =1.48 g•cm-3,68 %的浓硝酸多少毫升?( )1.欲配置1.0 mol·L-1的硝酸溶液0.5 L,需取用ρ =1.48 g·cm-3,68 %的浓硝酸多少毫升?( )A.31.3 mL B.62.6 mL C.15.7 mL D.46.8
1.欲配置1.0 mol•L-1的硝酸溶液0.5 L,需取用ρ =1.48 g•cm-3,68 %的浓硝酸多少毫升?( )
1.欲配置1.0 mol·L-1的硝酸溶液0.5 L,需取用ρ =1.48 g·cm-3,68 %的浓硝酸多少毫升?( )
A.31.3 mL B.62.6 mL
C.15.7 mL D.46.8 mL
答案是不是A
1.欲配置1.0 mol•L-1的硝酸溶液0.5 L,需取用ρ =1.48 g•cm-3,68 %的浓硝酸多少毫升?( )1.欲配置1.0 mol·L-1的硝酸溶液0.5 L,需取用ρ =1.48 g·cm-3,68 %的浓硝酸多少毫升?( )A.31.3 mL B.62.6 mL C.15.7 mL D.46.8
答案是A
此题先求68 %的浓硝酸的物质的量浓度,然后根据稀释前后溶质的物质的量不变,即可求得.
设需取浓硝酸的体积为V1
68 %的浓硝酸C1=1000pW/M=1000*1.48 g·cm-3*68 %/63g/mol=16.0mol/L
C1V1=C2V2
V1=1.0mol/L*0.5L/16.0mol/L=0.0313L=31.3ml