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a
\(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\downarrow\)
0,05 --> 0,1-----------> 0,05------>0,1
b
\(n_{Cu}=\dfrac{3,2}{64}=0,05\left(mol\right)\)
\(m_{Cu\left(NO_3\right)_2}=0,05.188=9,4\left(g\right)\)
c
\(a=m_{Ag}=108.0,1=10,8\left(g\right)\)
d
\(V_{AgNO_3}=\dfrac{0,1}{0,5}=0,2\left(l\right)\)
`a)PTHH:`
`Zn + 2HCl -> ZnCl_2 + H_2`
`0,1` `0,2` `0,1` `0,1` `(mol)`
`n_[HCl]=0,2.1=0,2(mol)`
`=>m_[Zn]=0,1.65=6,5(g)`
`b)m_[dd HCl]=1,1.200=220(g)`
`=>C%_[ZnCl_2]=[0,1.136]/[6,5+220-0,1.2].100~~6%`
\(a,n_{HCl}=0,2.1=0,2\left(mol\right)\)
PTHH: \(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
0,1<--0,2------>0,1------->0,1
\(\rightarrow m_{Zn}=0,1.65=6,5\left(g\right)\)
\(b,m_{ddHCl}=200.1,1=220\left(g\right)\)
\(\rightarrow m_{dd}=220+6,5-0,1.2=226,3\left(g\right)\\ \rightarrow C\%_{ZnCl_2}=\dfrac{0,1.136}{226,3}.100\%=6\%\)
\(n_{CuSO_4}=0.2\cdot0.5=0.1\left(mol\right)\)
\(CuSO_4+2NaOH\rightarrow Cu\left(OH\right)_2+Na_2SO_4\)
\(0.1.............0.2.................0.1..........0.1\)
\(C_{M_{Na_2SO_4}}=\dfrac{0.1}{0.3+0.2}=0.2\left(M\right)\)
\(Cu\left(OH\right)_2\underrightarrow{^{^{t^0}}}CuO+H_2O\)
\(0.1.............0.1\)
\(m_{CuO}=0.1\cdot80=8\left(g\right)\)
a) $n_{HCl} = 0,2.1 = 0,2(mol)$
$NaOH + HCl \to NaCl + H_2O$
$n_{NaCl} = n_{HCl} = 0,2(mol) \Rightarrow m_{NaCl} = 0,2.58,5 = 11,7(gam)$
b) $C_{M_{NaCl}} = \dfrac{0,2}{0,2} = 1M$
\(V_{NaCl}=0,2\left(l\right)\) đâu ra vậy anh ơi em chưa hiểu lắm
1:
a) \(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)
PTHH: \(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\uparrow\)
______0,2------>0,2------------------->0,2_____(mol)
=> \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)
b) \(V_{ddH_2SO_4}=\dfrac{0,2}{1}=0,2\left(l\right)\)
2:
a)
\(n_{HCl}=2.0,2=0,4\left(mol\right)\)
PTHH: \(Mg+2HCl\rightarrow MgCl_2+H_2\uparrow\)
______0,2<------0,4------------------>0,2______(mol)
=> \(m_{Mg}=0,2.24=4,8\left(g\right)\)
b) \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)
a) \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
PTHH: Fe + 2HCl --> FeCl2 + H2
0,1-->0,2------>0,1--->0,1
=> \(m_{FeCl_2}=0,1.127=12,7\left(g\right)\)
b) mdd sau pư = 5,6 + 200 - 0,1.2 = 205,4 (g)
=> \(C\%=\dfrac{12,7}{205,4}.100\%=6,18\%\)
nH2 = 6.72 / 22.4 = 0.3 (mol)
Mg + H2SO4 => MgSO4 + H2
0.3.......0.3.............0.3........0.3
mMg = 0.3 * 24 = 7.2 (g)
mH2SO4 = 0.3 * 98 = 29.4 (g)
mddH2SO4 = 29.4 * 100 / 19.6 = 150 (g)
mMgSO4 = 0.3 * 120 = 36 (g)
a)
$Mg + 2HCl \to MgCl_2 + H_2$
Theo PTHH :
$n_{MgCl_2} = n_{H_2} = \dfrac{5,6}{22,4} = 0,25(mol)$
$m_{MgCl_2} = 0,25.95 = 23,75(gam)$
b)
$n_{HCl} = 2n_{H_2} = 0,5(mol)$
$m_{dd\ HCl} = \dfrac{0,5.36,5}{7,3\%} = 250(gam)$
c)
$2K + 2H_2O \to 2KOH + H_2$
$n_K = 2n_{H_2} = 0,5(mol)$
$m_K = 0,5.39 = 19,5(gam)$
AgNO3 + HCl → AgCl↓ + HNO3
(mol) 0,2 0,2 0,2
nHCl = CM x V = 1 x 0,2 = 0,2 (mol)
a/ mAgCl = n x M = 0,2 x 143,5 = 28,7 (g)
b/ mAgNO3 đã dùng = 0,2 x 170 = 34 (g)