设需要浓硫酸的体积为x
x×1.84g/mL×98%=368 g×19.6% x=40.0 mL
(2)设需要浓硫酸的质量为y,生成硫酸钠的质量为z
2NaOH + H 2 SO 4 === Na 2 SO 4 + 2H 2 O
80 98 142
1000g×4.0% y×98.0% z
y=50g z=71g
(3)71g/(1000 g + 50 g) ×100% =6.8 %
设需要浓硫酸的体积为x
x×1.84g/mL×98%=368 g×19.6% x=40.0 mL
(2)设需要浓硫酸的质量为y,生成硫酸钠的质量为z
2NaOH + H 2 SO 4 === Na 2 SO 4 + 2H 2 O
80 98 142
1000g×4.0% y×98.0% z
y=50g z=71g
(3)71g/(1000 g + 50 g) ×100% =6.8 %