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\(a/2Al+6HCl\xrightarrow[]{}2AlCl_3+3H_2\\ b/n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\\ n_{AlCl_3}=n_{Al}=0,2mol\\ m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\\ c/higro\Rightarrow hydrogen\\ n_{H_2}=\dfrac{0,2.3}{2}=0,3\left(mol\right)\\ V_{H_2}=0,3.24,79=7,437\left(l\right)\\ d/n_{HCl}=\dfrac{0,2.6}{2}=0,6\left(mol\right)\\ V_{HCl}=\dfrac{0,6}{2}=0,3\left(l\right)\)
\(a/2Al+3H_2SO_4\xrightarrow[]{}Al_2\left(SO_4\right)_3+3H_2\)
\(b/30ml=0,03l\\ n_{H_2SO_4}=0,5.0,03=0,0015\left(mol\right)\\ n_{Al}=\dfrac{0,0015.2}{3}=0,001\left(mol\right)\\ m_{Al}=0,001.27=0,027\left(g\right)\\ n_{Al_2\left(SO_4\right)_3}=\dfrac{0,0015}{2}=0,00075\left(mol\right)\\ m_{Al_2\left(SO_4\right)_3}=0,00075.342=0,2565\left(g\right)\)
\(c/n_{H_2}=\dfrac{0,0015.3}{3}=0,0015\left(mol\right)\\ V_{H_2}=0,0015.24,79=0,037185\left(l\right)\)
\(a.2Al+3H_2SO_4->Al_2\left(SO_4\right)_3+3H_2\\ b.n_{Al}=1,5.0,5.0,03=0,0375mol\\ m_{Al}=0,0375.27=1,0125g\\ m_{Al_2\left(SO_4\right)_3}=342\cdot\dfrac{1}{3}\cdot0,03\cdot0,5=1,71g\\V_{H_2}=24,79.0,5.0,03=0,37185L\)
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
0,05 -->0,1----->0,05----->0,05
b
\(n_{Mg}=\dfrac{1,2}{24}=0,05\left(mol\right)\)
\(m_{MgCl_2}=0,05.95=4,75\left(g\right)\)
c
\(V_{H_2}=0,05.24,79=1,2395\left(l\right)\)
d
\(V_{HCl}=\dfrac{0,1}{2}=0,05\left(l\right)\)
\(n_{HCl}=0,5.0,2=0,1\left(mol\right)\)
Pt : \(Fe+2HCl\rightarrow FeCl_2+H_2\)
0,05<--0,1----->0,05--->0,05
\(m_{Fe}=0,05.56=2,8\left(g\right)\)
\(m_{FeCl2}=0,05.127=6,35\left(g\right)\)
\(V_{H2\left(dktc\right)}=0,05.22,4=1,12\left(l\right)\)
\(V_{H2\left(dkc\right)}=0,05.24,79=1,2395\left(l\right)\)
\(n_{Mg}=\dfrac{9,6}{24}=0,4\left(mol\right)\\ a,PTHH:Mg+2HCl\rightarrow MgCl_2+H_2\\ b,n_{MgCl_2}=n_{H_2}=n_{Mg}=0,4\left(mol\right)\\ m_{MgCl_2}=95.0,4=38\left(g\right)\\ b,V_{H_2\left(đkc\right)}=0,4.24,79=9,916\left(l\right)\\ d,n_{HCl}=0,4.2=0,8\left(mol\right)\\ V_{ddHCl}=\dfrac{0,8}{2}=0,4\left(l\right)\)
cho tui hỏi sao thể tích cần dùng lại tính thêm thể tích hcl vậy ạ
\(a/Fe+2HCl\xrightarrow[]{}FeCl_2+H_2\\ b/n_{H_2}=n_{FeCl_2}=0,1mol\\ m_{FeCl_2}=0,1.127=12,7\left(g\right)\\ c/V_{H_2}=0,1.22,4=2,24\left(l\right)\\ d/n_{HCl}=0,1.2=0,2\left(mol\right)\\ V_{HCl\left(pư\right)}=\dfrac{0,2}{2}=0,1\left(l\right)\)
\(c,V_{H_2}=0,1.22,4=2,24\left(l\right)\)
Còn lại giống câu dưới nha
a, \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b, \(n_{Zn}=\dfrac{39}{65}=0,6\left(mol\right)\)
Theo PT: \(n_{HCl}=2n_{Zn}=1,2\left(mol\right)\Rightarrow m_{HCl}=1,2.36,5=43,8\left(g\right)\)
c, \(n_{H_2}=n_{Zn}=0,6\left(mol\right)\Rightarrow V_{H_2}=0,6.24,79=14,874\left(l\right)\)
d, - Quỳ tím hóa đỏ do HCl dư.
a. \(n_{H_2}=\dfrac{7.437}{24,79}=0,3\left(mol\right)\)
PTHH : 2Al + 6HCl -> 2AlCl3 + 3H2
0,2 0,6 0,3
\(m_{Al}=0,2.27=5,4\left(g\right)\)
\(m_{HCl}=0,6.36,5=21,9\left(g\right)\)
nH2 = 7,437/24,79 = 0,3 (mol)
PTHH: 2Al + 6HCl -> 2AlCl3 + 3H2
Mol: 0,2 <--- 0,6 <--- 0,2 <--- 0,3
mAl = 0,2 . 27 = 5,4 (g)
mHCl = 0,6 . 36,5 = 21,9 (g)
mAlCl3 = 0,2 . 204,5 = 40,9 (g)
PTHH: Fe2O3 + 3H2 -> (t°) 2Fe + 3H2O
Mol: 0,1 <--- 0,3
mFe2O3 = 0,1 . 160 = 16 (g)
\(a.Mg+2HCl\rightarrow MgCl_2+H_2\\ b.n_{Mg}=\dfrac{4,8}{24}=0,2mol\\ Mg+2HCl\rightarrow MgCl_2+H_2\)
0,2 0,4 0,2 0,2
\(V_{H_2}=0,2.24,79=4,958l\\ c.m_{MgCl_2}=0,2.95=19g\\ d.C_{M_{HCl}}=\dfrac{0,4}{0,3}=\dfrac{4}{3}M\)
\(a.2Al+6HCl->2AlCl_3+3H_2\\ b.m_{AlCl_3}=\dfrac{1}{3}.0,1.0,6.133,5=2,67g\\ c.V_{H_2}=\dfrac{1}{2}.0,06.24,79=0,7437\left(L\right)\\ d.a=\dfrac{1}{3}.0,1.0,6.27=0,54g\)