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Tham khảo
a.BaCl2+2AgNO3→Ba(NO3)3+2AgClb.nAgNO3=300.20%170=617(mol)nAgCl=24143,5=48287(mol)Tacó:nAgNO3(pư)=nAgCl=48287(mol)⇒H=48287617.100=47,39%c.mddsaupu=300+200−24=476(g)nBa(NO3)2=12nAgCl=24287(mol)nAgNO3(dư)=617−48287=9064879(mol)⇒C%Ba(NO3)2=4,59%;C%AgNO3(dư)=6,63%
\(a.BaCl_2+2AgNO_3\rightarrow Ba\left(NO_3\right)_3+2AgCl\\b. n_{AgNO_3}=\dfrac{300.20\%}{170}=\dfrac{6}{17}\left(mol\right)\\ n_{AgCl}=\dfrac{24}{143,5}=\dfrac{48}{287}\left(mol\right)\\ Tacó:n_{AgNO_3\left(pư\right)}=n_{AgCl}=\dfrac{48}{287}\left(mol\right)\\ \Rightarrow H=\dfrac{\dfrac{48}{287}}{\dfrac{6}{17}}.100=47,39\%\\ c.m_{ddsaupu}=300+200-24=476\left(g\right)\\ n_{Ba\left(NO_3\right)_2}=\dfrac{1}{2}n_{AgCl}=\dfrac{24}{287}\left(mol\right)\\ n_{AgNO_3\left(dư\right)}=\dfrac{6}{17}-\dfrac{48}{287}=\dfrac{906}{4879}\left(mol\right)\\ \Rightarrow C\%_{Ba\left(NO_3\right)_2}=4,59\%;C\%_{AgNO_3\left(dư\right)}=6,63\%\)
PTHH: \(NaCl+AgNO_3\rightarrow NaNO_3+AgCl\downarrow\)
Ta có: \(n_{NaCl}=0,2\cdot0,5=0,1\left(mol\right)=n_{AgNO_3}=n_{AgCl}\)
\(\Rightarrow\left\{{}\begin{matrix}C_{M_{AgNO_3}}=\dfrac{0,1}{0,4}=0,25\left(M\right)\\m_{AgCl}=0,1\cdot143,5=14,35\left(g\right)\end{matrix}\right.\)
\(m_{H_2SO_4}=\dfrac{19,6\cdot20\%}{100\%}=3,92\left(g\right)\\ \Rightarrow n_{H_2SO_4}=\dfrac{3,92}{98}=0,04\left(mol\right)\\ PTHH:H_2SO_4+BaCl_2\rightarrow BaSO_4\downarrow+2HCl\\ \Rightarrow n_{H_2SO_4}=n_{BaCl_2}=n_{BaSO_4}=0,04\left(mol\right)\\ \Rightarrow m_{CT_{BaCl_2}}=0,04\cdot208=8,32\left(g\right)\\ \Rightarrow m_{dd_{BaCl_2}}=\dfrac{8,32\cdot100\%}{12\%}\approx69,3\left(g\right)\\ m_{kết.tủa}=m_{BaSO_4}=0,04\cdot233=9,32\left(g\right)\)
\(a,PTHH:CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\\ Cu\left(OH\right)_2\rightarrow^{t^0}CuO+H_2O\\ b,n_{CuCl_2}=n_{Cu\left(OH\right)_2}=n_{CuO}=0,2\left(mol\right)\\ \Rightarrow m_{CuO}=0,2\cdot80=16\left(g\right)\\ c,n_{NaCl}=2n_{CuCl_2}=0,4\left(mol\right)\\ \Rightarrow m_{NaCl}=0,4\cdot58,5=23,4\left(g\right)\\ \Rightarrow C\%_{NaCl}=\dfrac{23,4}{200}\cdot100\%=11,7\%\)
nAgNO3= (100.17%)/170=0,1(mol)
nHCl= (300.3,65%)/36,5=0,3(mol)
a) PTHH: AgNO3 + HCl -> AgCl + HNO3
Ta có: 0,1/1 < 0,3/1
=> AgNO3 hết, HCl dư, tính theo nAgNO3
Ta có: nAgCl= nHNO3= nHCl(p.ứ)= nAgNO3= 0,1(mol)
=>m(kt)=mAgCl= 143,5.0,1= 14,35(g)
b) mHCl(dư)= (0,3- 0,1).36,5=7,3(g)
mHNO3= 63.0,1= 6,3(g)
mddsau= mddAgNO3 + mddHCl - mAgCl= 100+300- 14,35= 385,65(g)
=>C%ddHCl(dư)= (7,3/385,65).100= 1,893%
C%ddHNO3= (6,3/385,65).100=1,634%
\(a.BaCl_2+2AgNO_3\rightarrow Ba\left(NO_3\right)_3+2AgCl\\b. n_{AgNO_3}=\dfrac{300.20\%}{170}=\dfrac{6}{17}\left(mol\right)\\ n_{AgCl}=\dfrac{24}{143,5}=\dfrac{48}{287}\left(mol\right)\\ Tacó:n_{AgNO_3\left(pư\right)}=n_{AgCl}=\dfrac{48}{287}\left(mol\right)\\ \Rightarrow H=\dfrac{\dfrac{48}{287}}{\dfrac{6}{17}}.100=47,39\%\\ c.m_{ddsaupu}=300+200-24=476\left(g\right)\\ n_{Ba\left(NO_3\right)_2}=\dfrac{1}{2}n_{AgCl}=\dfrac{24}{287}\left(mol\right)\\ n_{AgNO_3\left(dư\right)}=\dfrac{6}{17}-\dfrac{48}{287}=\dfrac{906}{4879}\left(mol\right)\\ \Rightarrow C\%_{Ba\left(NO_3\right)_2}=4,59\%;C\%_{AgNO_3\left(dư\right)}=6,63\%\)