\(n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

PT: \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)

Theo PT:  \(n_{Ca\left(OH\right)_2}=n_{CaCO_3}=n_{CO_2}=0,25\left(mol\right)\)

a, \(C_{M_{Ca\left(OH\right)_2}}=\dfrac{0,25}{0,1}=2,5\left(M\right)\)

b, \(m_{CaCO_3}=0,25.100=25\left(g\right)\)

c, \(Ca\left(OH\right)_2+2HCl\rightarrow CaCl_2+2H_2O\)

Theo PT: \(n_{HCl}=2n_{Ca\left(OH\right)_2}=0,5\left(mol\right)\)

\(\Rightarrow m_{ddHCl}=\dfrac{0,5.36,5}{20\%}=91,25\left(g\right)\)

a) PTHH:
So2 + Ca(OH)2 \Rightarrow CaSO3 (kt) + H2O
b) 
n SO2 =112/22400 =0.005 (mol)
n Ca(OH)2 =0.7 *0.01 =0.007 (mol)
Ca(OH)2 dư và dư : 0.007 -0.005 =0.002 (mol)
Theo phương trình hoá học :

SO2 + Ca(OH)2 \Rightarrow CaSO3 (kt) + H2O
1 mol 1 mol 1 mol
0.005 0.005 0.005
m CaCo3 =0.005 *120 =0.6 (g)
m Ca(OH)2 = 0.002 *74 =0.148 (g)

\(n_{SO_2}=\frac{\frac{112}{1000}}{22,4}==0,005\left(mol\right)\)

\(n_{Ca\left(OH\right)_2}=\frac{700}{1000}.0,01=0,007\left(mol\right)\)

a/ PTHH : Ca(OH)₂ + SO₂ -----> CaSO₃ + H₂O

 b/ Ta có : \(\frac{n_{Ca\left(OH\right)_2}\left(\text{đề bài}\right)}{n_{Ca\left(OH\right)_2}\left(\text{phương trình}\right)}=\frac{0,007}{1}>\frac{n_{SO_2}\left(\text{đề bài}\right)}{n_{SO_2}\left(\text{phương trình}\right)}=\frac{0,005}{1}\)

=> SO₂ phản ứng hết, Ca(OH)₂ dư 0,007 - 0,005 = 0,002 (mol)

+) \(n_{H_2O}=n_{SO_2}=0,005\left(mol\right)\Rightarrow m_{H_2O}=0,005.18=0,09\left(g\right)\)

+) \(n_{CaSO_3}=n_{SO_2}=0,005\left(mol\right)\Rightarrow m_{CaSO_3}=0,005.120=0,6\left(g\right)\)

+) \(m_{Ca\left(OH\right)_2\text{dư}}=0,002.74=0,148\left(g\right)\)

a. \(n_{CO_2}=0,02\left(mol\right);n_{Ca\left(OH\right)_2}=0,008\left(mol\right)\Rightarrow n_{OH^-}=0,016\\ Tacó:\dfrac{n_{OH^-}}{n_{CO_2}}=\dfrac{0,016}{0,02}=0,8\Rightarrow ChỉtạoCa\left(HCO_3\right)_2,CO_2dư\\ 2CO_2+Ca\left(OH\right)_2\rightarrow Ca\left(HCO_3\right)_2+H_2O\\ n_{Ca\left(HCO_3\right)_2}=n_{Ca\left(OH\right)_2}=0,016\left(mol\right)\\ \Rightarrow CM_{Ca\left(HCO_3\right)_2}=\dfrac{0,016}{0,4}=0,04M\)

\(b.n_{SO_2}=0,18\left(mol\right);n_{Ba\left(OH\right)_2}=0,2\left(mol\right)\Rightarrow n_{OH^-}=0,4\left(mol\right)\\Tacó:\dfrac{n_{OH^-}}{n_{CO_2}}=\dfrac{0,4}{0,18}=2,22\Rightarrow Ba\left(OH\right) _2dư\\ SO_2+Ba\left(OH\right)_2\rightarrow BaCO_3+H_2O\\ n_{Ba\left(OH\right)_2dư}=0,2-0,18=0,02\left(mol\right)\\ \Rightarrow CM_{Ba\left(OH\right)_2dư}=\dfrac{0,02}{0,2}=0,1M\)

Bài 23 : 

n BaCO3 = 0,1(mol) > n Ba(OH)2 = 0,15 mol

- TH1 : Ba(OH)2 dư

$Ba(OH)_2 + CO_2 \to BaCO_3 + H_2O$

n CO2 = n BaCO3 = 0,1(mol)

=> V = 0,1.22,4 = 2,24 lít

- TH1 : BaCO3 bị hòa tan một phần

$Ba(OH)_2 + CO_2 \to BaCO_3 + H_2O(1)$
$Ba(OH)_2 + 2CO_2 \to Ba(HCO_3)_2(2)$

n CO2(1) = n Ba(OH)2 (1) = n BaCO3 = 0,1(mol)

=> n Ba(OH)2 (2) = 0,15 - 0,1 = 0,05(mol)

=> n CO2 (2) = 2n Ba(OH)2 (2) = 0,1(mol)

=> V = (0,1 + 0,1).22,4 = 4,48 lít

Bài 24 : 

$Ca(OH)_2 + CO_2 \to CaCO_3 + H_2O$

n Ca(OH)2 = n CO2 = 2,24/22,4 = 0,1(mol)

CM Ca(OH)2 = 0,1/0,2 = 0,5M

Bài 27 : 

n CO2 = 0,1(mol)

Ta có : 

 n CO2 /  n Ca(OH)2 = 0,1/0,25 = 0,4 < 1

Do đó, sản phẩm muối gồm CaCO3 do Ca(OH)2 dư

Câu 25 : 

$CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O$

$2CO_2 + Ca(OH)_2 \to Ca(HCO_3)_2$

Vì thu được hai muối nên : 

1 < a/b < 2

<=> b < a < 2b

n_CO2+CO=\(\dfrac{4,48}{22,4}\)= 0,2(mol)

CO2 + Ca(OH)₂  \(\rightarrow\) CaCO3\(\downarrow\)  + H₂O (*)

Muối duy nhất không tan là CaCO3\(\downarrow\)

n_CaCO3=\(\dfrac{10}{100}\)= 0,1(mol)

\(\Rightarrow\)Theo (*) n_CaCO3=n_Ca(OH)2= 0,1(mol)

\(\Rightarrow\) C_{M Ca(OH)2}=\(\dfrac{0,1}{0,1}\)= 1(M)

\(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ C_2H_4+3O_2\rightarrow\left(t^o\right)2CO_2+2H_2O\\ a,n_{O_2}=3.0,5=1,5\left(mol\right)\\ V_{O_2\left(đktc\right)}=1,5.22,4=33,6\left(l\right)\\ V_{kk\left(đktc\right)}=33,6.5=168\left(l\right)\\ b,n_{CO_2}=n_{H_2O}=2.0,5=1\left(mol\right)\\ m_{CO_2}=44.1=44\left(g\right);m_{H_2O}=18.1=18\left(g\right)\\ c,CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\\ n_{Ca\left(OH\right)_2}=n_{CO_2}=1\left(mol\right)\\ m_{Ca\left(OH\right)_2}=1.74=74\left(g\right)\\ m_{ddCa\left(OH\right)_2}=\dfrac{74.100}{10}=740\left(g\right)\)

\(n_{SO_2}=\dfrac{0,112}{22,4}=0,005\left(mol\right)\\ n_{Ca\left(OH\right)_2}=0,01\cdot0,7=0,007\left(mol\right)\\ PTHH:SO_2+Ca\left(OH\right)_2\rightarrow CaSO_3\downarrow+H_2O\\ \text{Vì }\dfrac{n_{SO_2}}{1}< \dfrac{n_{Ca\left(OH\right)_2}}{1}\text{ nên sau p/ứ }Ca\left(OH\right)_2\text{ dư}\\ \Rightarrow n_{CaSO_3}=n_{H_2O}=0,005\left(mol\right)\\ \Rightarrow\left\{{}\begin{matrix}m_{CaSO_3}=0,005\cdot120=0,6\left(g\right)\\m_{H_2O}=0,005\cdot18=0,09\left(g\right)\end{matrix}\right.\)

a)

PTHH : \(SO_2+Ca\left(OH\right)_2\rightarrow CáO_4+H_2O\)

b)

Ta có :

\(n_{SO_2}=\frac{0,224}{22,4}=0,01\left(mol\right)\)

\(n_{Ca\left(OH\right)_2}=0,01\times1,4=0,014\)

Theo ptpư : \(n_{SO_2}=n_{Ca\left(OH\right)_2}=n_{CaSO_3}=n_{H_2O}\)

Vậy n_{Ca(OH)2 ( dư )} = \(n_{Ca\left(OH\right)_2\left(bđ\right)}-n_{Ca\left(OH\right)_2\left(pư\right)}\)

\(=0,014-0,001=0,004\left(mol\right)\)