\(n(NH4)2SO4 = 13,2% x 200 = 26,4g => n(NH4)2SO4 = 0,20265mol\) \( .200 = 26,4g => n(NH4)2SO4 = 0,20265mol\)
\(mdd Ba(OH)2 = 3,743 x 200 = 748,6g\)
\(=> m Ba(OH)2 = 6,85% x 748,6= 51,2791gam => nBa(OH)2 ≈0,3mol\) \( .748,6= 51,2791gam => nBa(OH)2 ≈0,3mol\)
\(PTHH :\)
\((NH4)2SO4 + Ba(OH)2 --> BaSO4 + 2NH4OH\)
\(0,20265 \) \( 0,20265 \) \( 0,20265 \) \( 0,4053 (mol)\)
khi thế \(n(NH4)2SO4 \) thì thấy nBa(OH)2 dư
mdd sau \(pứng = mdd(NH4)2SO4 + mdd Ba(OH)2 - mBaSO4\)
\(=>mdd=901,38255 g\)
\(nBa(OH)2 dư = 0,3 - 0,20265= 0,09735mol\)
\(C NH4OH =\dfrac{0,4053.35}{903,38255}=x 100 ≈ 1,574\)
\(CBa(OH)2 dư=\) \(\dfrac{0,09735.171}{901,38255}=.100\) ∼ 1,847%