一道高一的化学计算题急!
发布网友
发布时间:2024-09-29 18:51
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共3个回答
热心网友
时间:2024-11-18 14:18
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
热心网友
时间:2024-11-18 14:19
题目是什么?
热心网友
时间:2024-11-18 14:19
1) c = 1000ρω/M = 1000*1.84*0.98/98 = 18.4 mol/L
2) n(SO3) = n(S) = m/M = 100/32 = 3.2 mol
c(H2SO4) = n/V = 3.2 mol/L
3) n(SO3) = n(S) = m/M = 1000/32 = 32 mol
V = n/c = 32/18.4 = 1.7L