实验室需要配制1mol/L的硫酸100ml,需取用98%的浓硫酸<密度为1.84g/ml>多少毫升? <保留一位小数>
\u5b9e\u9a8c\u5ba4\u9700\u8981\u914d\u52361mol/L\u7684\u786b\u9178100ml,\u9700\u53d6\u752898%\u7684\u6d53\u786b\u9178<\u5bc6\u5ea6\u4e3a1.84g/ml>\u591a\u5c11\u6beb\u5347? <\u4fdd\u7559\u4e00\u4f4d\u5c0f\u6570>1mol/L\u7684\u786b\u9178100ml,\u9700 \u7eaf\u6d53\u786b\u9178\u7684\u8d28\u91cf=1*0.1*98=9.8\u514b\uff0c98%\u7684\u6d53\u786b\u9178\u7684\u8d28\u91cf=9.8/98%=10g,\u4f53\u79ef=10/1.84=5.4ml
\u6d53H2SO4\u7684\u7269\u8d28\u7684\u91cf\u6d53\u5ea6c=1000\u00d71.84\u00d798%98mol/L=18.4mol/L\uff0e\u6839\u636e\u7a00\u91ca\u5b9a\u5f8b\uff0c\u7a00\u91ca\u524d\u540e\u6eb6\u8d28\u7684\u7269\u8d28\u7684\u91cf\u4e0d\u53d8\uff0c\u6765\u8ba1\u7b97\u6d53\u786b\u9178\u7684\u4f53\u79ef\uff0c\u8bbe\u6d53\u786b\u9178\u7684\u4f53\u79ef\u4e3axmL\uff0c\u6240\u4ee5xmL\u00d718.4mol/L=100mL\u00d71mol/L\uff0c\u89e3\u5f97\uff1ax\u22485.4\uff0e\u6545\u6240\u9700\u6d53\u786b\u9178\u7684\u4f53\u79ef\u4e3a5.4mL\uff0e\u7b54\uff1a\u9700\u53d6\u752898%\u7684\u6d53\u786b\u91785.4mL\uff0e
n(H2SO4)=cV=1*0.1 = 0.1 molm(H2SO4)=nM=0.1*98=9.8 g
需要98%的浓硫酸的质量是9.8/98%= 10 g
V(H2SO4)=m/ρ=10/1.84= 5.4 mL
需要浓硫酸 5.4 mL
100ml/1o00ml*1mol/L=0.1mol 1000ml(浓H2S04)中H2S04质量为1000ml*1.84g/ml*98%=1803g n(H2SO4)=1803g/98g/mol=18.4mol 含0.1molH2SO4的浓硫酸的体积0.1mol/18.4mol/L=5.4ml
不懂请追问，谢谢参照
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