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a)
$CuO + H_2SO_4 \to CuSO_4 + H_2O$
b)
$n_{CuSO_4} = n_{CuO} = \dfrac{4}{80} = 0,05(mol)$
$m_{CuSO_4} = 0,05.160 = 8(gam)$
c)
$C_{M_{CuSO_4}} = \dfrac{0,05}{0,15} = 0,33M$
a)
$Zn + H_2SO_4 \to ZnSO_4 + H_2$
Theo PTHH :
$n_{H_2} = n_{Zn} = \dfrac{6,5}{65} = 0,1(mol)$
$V_{H_2} = 0,1.22,4 = 2,24(lít)$
b) $n_{H_2SO_4} = n_{Zn} = 0,1(mol)$
$V_{dd\ H_2SO_4} = \dfrac{0,1}{1} = 0,1(lít)$
c) $n_{ZnSO_4} = 0,1(mol) \Rightarrow m_{ZnSO_4} = 0,1.161 = 16,1(gam)$
d) $C_{M_{ZnSO_4}} = \dfrac{0,1}{0,1} = 1M$
\(n_{HCl}=0.2\cdot1.5=0.3\left(mol\right)\)
\(n_{KOH}=0.15\cdot2=0.3\left(mol\right)\)
\(KOH+HCl\rightarrow KCl+H_2O\)
\(0.3..........0.3..........0.3\)
\(m_{KCl}=0.3\cdot74.5=22.35\left(g\right)\)
\(C_{M_{KCl}}=\dfrac{0.3}{0.2+0.15}=0.85\left(M\right)\)
a, \(CuO+2HCl\rightarrow CuCl_2+H_2O\)
b, \(n_{HCl}=0,2.0,5=0,1\left(mol\right)\)
Theo PT: \(n_{CuO}=n_{CuCl_2}=\dfrac{1}{2}n_{HCl}=0,05\left(mol\right)\)
\(\Rightarrow m_{CuO}=0,05.80=4\left(g\right)\)
c, \(C_{M_{CuCl_2}}=\dfrac{0,05}{0,2}=0,25\left(M\right)\)
\(n_{HCl}=0,2.0,5=0,1\left(mol\right)\)
PTHH :
\(CuO+2HCl\rightarrow CuCl_2+H_2O\)
0,05 0,1 0,05
\(b,m_{CuO}=0,05.80=4\left(g\right)\)
\(c,C_{M\left(CuCl_2\right)}=\dfrac{0,05}{0,2}=0,25\left(M\right)\)
a, \(n_{HCl}=0,15.1=0,15\left(mol_{ }\right)\)
PTHH: CuO + 2HCl → CuCl2 + H2O
Mol: 0,075 0,15 0,075
b, \(C_{M_{ddCuCl_2}}=\dfrac{0,075}{0,15}=0,5M\)
\(n_{CuO}=\dfrac{4}{80}=0.05\left(mol\right)\)
\(n_{H_2SO_4}=0.15\cdot1=0.15\left(mol\right)\)
\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)
\(TC:\dfrac{0.05}{1}< \dfrac{0.15}{1}\Rightarrow H_2SO_4dư\)
\(m_{CuSO_4}=0.05\cdot160=8\left(g\right)\)
\(C_{M_{CuSO_4}}=\dfrac{0.05}{0.15}=0.33\left(M\right)\)
a)
PTHH: CuO + H2SO4 -> CuSO4+ H2O
b) nCuO=0,1(mol); nH2SO4=0,15(mol)
Vì: 0,1/1 < 0,15/1
-> H2SO4 dư, CuO hết, tính theo nCuO
nCuSO4=nH2SO4(p.ứ)=nCuO=0,1(mol)
=>mCuSO4=160.0,1=16(g)
c) nH2SO4(dư)=0,05(mol)
Vddsau=VddH2SO4=0,15(l)
=>CMddH2SO4(dư)=0,05/0,15=1/3(M)
CMddCuSO4=0,1/0,15=2/3(M)