Na2SO4+BaCl2===BaSO4↓+2NaCl
142 208
x 20.8g*20%
142/x=208/4.16g
x=2.84g
(1)滤液的质量分数2.84g/10g*100%=28.4%.
(2)硫酸钠的纯度.
15.5克样品中硫酸钠的质量为 35.8g*2.84g/(10g-2.84g)=14.2g
纯度 14.2g/15.5g*100%=91.6%
Na2SO4+BaCl2===BaSO4↓+2NaCl
142 208
x 20.8g*20%
142/x=208/4.16g
x=2.84g
(1)滤液的质量分数2.84g/10g*100%=28.4%.
(2)硫酸钠的纯度.
15.5克样品中硫酸钠的质量为 35.8g*2.84g/(10g-2.84g)=14.2g
纯度 14.2g/15.5g*100%=91.6%