陈十万
幼苗
共回答了18个问题采纳率:94.4% 举报
1、取1L98%硫酸计算
n(H2SO4) = 1 * 1000 * 1.84 * 98% / 98 = 18.4mol
则c(H2SO4) = 18.4mol/L
2、“取100g的该硫磺,加水稀释”应该是硫酸才对吧?
m(H2SO4) = 100 * 98% = 98g
n(H2SO4) = 98 / 98 = 1mol
c(H2SO4) = 1mol/L
3、n(S) = 1000 / 32 = 31.25mol
理论上n(H2SO4) = n(S) = 31.25mol
m(H2SO4) = 31.25 * 98 g
制取98%质量百分比浓度的质量:31.25 * 98 / 98% = 3125g = 3.125千克
1年前
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