\(n_{H_2}=\dfrac{1.12}{22.4}=0.05\left(mol\right)\)

\(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)

\(0.05.......0.05......0.05...........0.05\)

\(m_{Zn}=0.05\cdot65=3.25\left(g\right)\)

\(C_{M_{H_2SO_4}}=\dfrac{0.05}{0.2}=0.25\left(M\right)\)

\(m_{ZnSO_4}=0.05\cdot161=8.05\left(g\right)\)

a,M2CO3+2HCl=>2MCl+H2O+CO2(1)
MHCO3+HCl=>MCl+H2O(2)
MCl+AgNO3=>MNO3+AgCl ( ket tua)(3)
HCl+AgNO3=>HNO3+AgCl(ket tua) (4)
HCl+KOH=>KCl+H2O(5)
b,goi nM2CO3=x, nMHCO3=y,MCl=Z
nCO2=0.4=>theo 1,2=>x+y=0.4(*)
dung dich A co MCl co n=2x+y+z va HCl du co n=w
P1,nAgCl=0.48=>theo 3,4=>(2x+y+z+w)/2=0.48(do chia lam 2 phan bang nhau)
P2,theo 5=>nHCl=nKOH+0.1=>w=0.2=>2x+y+z=0.76(**)
m muoin khan=mKCl+mMCl=0.1*74.5+(2x+y+z)(M+35.5)...
Vay kim loai can tim la Na
c,tong khoi luong 3 muoi ban dau=106x+84y+58.5z=43.71(***)
tu *,**,***=>x=0.3, y=0.1, z=0.06=>%Na2CO3=72.8%, %NaHCO3=19.2%,%NaCl=8%
d,nHCl ban dau =2x+y+w=0.9=>mHCl=32.85=>mddHCl=312.3=>V...

Phản ứng này không tạo khí bạn nhé :

200ml = 0,2l

300ml = 0,3l

\(n_{MgCl2}=\dfrac{19}{95}=0,2\left(mol\right)\)

a) Pt : \(MgCl_2+2NaOH\rightarrow Mg\left(OH\right)_2+2NaCl|\)

               1               2                   1                 2

             0,2                                 0,2               0,4

 \(n_{Mg\left(OH\right)2}=\dfrac{0,2.1}{1}=0,2\left(mol\right)\)

⇒ \(m_{Mg\left(OH\right)2}=0,2.58=11,6\left(g\right)\)

Pt : \(Mg\left(OH\right)_2\underrightarrow{t^o}MgO+H_2O|\)

             1               1            1

           0,2             0,2

\(n_{MgO}=\dfrac{0,2.1}{1}=0,2\left(mol\right)\)

⇒ \(m_{MgO}=0,2.40=8\left(g\right)\)

c) \(n_{NaCl}=\dfrac{0,2.2}{1}=0,4\left(mol\right)\)

\(V_{ddspu}=0,2+0,3=0,5\left(l\right)\)

\(C_{M_{NaCl}}=\dfrac{0,4}{0,5}=0,8\left(M\right)\)

 Chúc bạn học tốt

Bảo toàn khối lượng

\(m_{O_2}=m_{Oxit}-m_{KL}=48,84-34,44=14,4g\)

\(\rightarrow n_{O_2}=\frac{14,4}{32}=0,45mol\)

BTNT (O) \(n_{H_2O}=2n_{O_2}=0,9mol\)

\(n_{H_2}=\frac{4,032}{22,4}=0,18mol\)

BTNT (H)  \(n_{HCl}=2n_{H_2O}+2n_{H_2}=2,16mol\)

\(\rightarrow m_{HCl}=2,16.36,5=78,84g\)

\(m_{H_2}=0,18.2=0,36g\) và \(m_{H_2O}=0,9.18=16,2g\)

Bảo toàn khối lượng \(m_A+m_{HCl}=m_{\text{muối}}+m_{H_2O}+m_{H_2}\)

\(\rightarrow m_{\text{muối}}=48,84+78,84-0,36-16,2=111,12g\)

\(n_{CH_3COOH}=0.5\cdot1=0.5\left(mol\right)\)

\(CH_3COOH+NaOH\rightarrow CH_3COONa+H_2O\)

\(0.5...........................................0.5\)

\(m_{CH_3COOH}=0.5\cdot60=30\left(g\right)\)

\(m_{CH_3COONa}=0.5\cdot82=41\left(g\right)\)

\(n_{Na_2CO_3}=0.2\cdot0.5=0.1\left(mol\right)\)

\(2CH_3COOH+Na_2CO_3\rightarrow2CH_3COONa+CO_2+H_2O\)

\(0.2.........................0.1\)

\(\Rightarrow CH_3COOHdư\)

\(n_{CO_2}=n_{Na_2CO_3}=0.1\left(mol\right)\)

\(V_{CO_2}=0.1\cdot22.4=2.24\left(l\right)\)

nAl = 5,427=0,2(mol)5,427=0,2(mol)

nH2SO4 = 1 . 0,4 = 0,4 mol

Pt: 2Al + 3H2SO4 --> Al2(SO4)3 + 3H2

0,2 mol->0,3 mol---> 0,1 mol-----> 0,3 mol

Xét tỉ lệ mol giữa Al và H2SO4:

0,22<0,430,22<0,43

Vậy H2SO4 dư

VH2 = 0,3 . 22,4 = 6,72 (lít)

nH2SO4 dư = 0,4 - 0,3 = 0,1 mol

Pt: BaCl2 + H2SO4 --> BaSO4 + 2HCl

...................0,1 mol---> 0,1 mol

......3BaCl2 + Al2(SO4)3 --> 3BaSO4 + 2AlCl3

......................0,1 mol------> 0,3 mol

mBaSO4 = (0,1 + 0,3). 233 =93,2 (g)