\(n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)

\(n_{KOH}=0,15.1,5=0,225\left(mol\right)\)

Có: \(\dfrac{n_{KOH}}{n_{CO_2}}=0,45< 1\) → Pư tạo muối KHCO₃ và CO₂ dư.

PT: \(CO_2+KOH\rightarrow KHCO_3\)

____0,225_____0,225_____0,225 (mol)

\(\Rightarrow C_{M_{KHCO_3}}=\dfrac{0,225}{0,15}=1,5\left(M\right)\)

\(n_{CO_2}=\dfrac{11,2}{22,4}=0,5mol\\ n_{KOH}=0,15.1,5=0,225mol\\ T=\dfrac{0,225}{0,5}=0,45\\ \Rightarrow Tạo.NaHCO_3\left(CO_2.dư\right)\)

\(KOH+CO_2\rightarrow KHCO_3\\ n_{KHCO_3}=n_{KOH}=0,225mol\\ C_{M_{KOH}}=\dfrac{0,225}{0,15}=1,5M\)

\(n_{Cl_2}=\dfrac{3,36}{22,4}=0,15mol\\ Cl_2+2NaOH\rightarrow NaCl+NaOH+H_2O\\ n_{NaCl}=n_{NaOH}=n_{Cl_2}=0,15mol\\ C_{M_{NaCl}}=\dfrac{0,15}{0,3}=0,5M\\ C_{M_{NaClO}}=\dfrac{0,15}{0,3}=0,5M\)

\(n_{CO2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

Pt : \(2NaOH+CO_2\rightarrow Na_2CO_3+H_2O|\)

             2            1             1            1

            0,4         0,2          0,2

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

500ml = 0,5l

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

b) \(n_{Na2CO3}=\dfrac{0,2.1}{1}=0,2\left(mol\right)\)

⇒ \(m_{Na2CO3}=0,2.106=21,2\left(g\right)\)

 Chúc bạn học tốt

TK:

\(nCO_2=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

pthh:

\(CO_2+2NaOH\rightarrow Na_2CO_3+H_2O\)

1mol     2mol              1mol        1mol

0,2       0,4               0,2               0,2

\(CM_{NaOH}=\dfrac{0,4}{0,5}=0,8M\)

\(mNa_2CO_3=\) 0,2 . 106 = 21,2 gam

n CO2=\(\dfrac{4,48}{22,4}\)=0,2 mol

TH1

CO₂+2NaOH->Na₂CO₃+H₂O

0,2-----0,4--------------0,2 mol

CM_NaOH=\(\dfrac{0,4}{0,5}\)=0,8 M

=>m _muối=0,2.106=21,2g

TH2 :

NaOH+CO₂->NaHCO₃

0,2--------0,2---------0,2 mol

Cm_NaOH =\(\dfrac{0,2}{0,5}=0,4M\)

=>m _NaHCO3=0,2.84=16,8g

Bài 1 : 

$n_{CO_2} = \dfrac{3,136}{22,4} = 0,14(mol)$
$n_{Ca(OH)_2} = 0,8.0,1 = 0,08(mol)$

CO₂ + Ca(OH)₂ → CaCO₃ + H₂O

0,08.......0,08...........0,08........................(mol)

CaCO₃ + CO₂ + H₂O → Ca(HCO₃)₂

0,06........0,06........................................(mol)

Suy ra : $m_{CaCO_3} = (0,08 - 0,06).100 = 2(gam)$

Bài 2 : 

$n_{CO_2} = \dfrac{2,24}{22,4} = 0,1(mol) ; n_{NaOH} = 0,1.1,5 = 0,15(mol)$
2NaOH + CO₂ → Na₂CO₃ + H₂O

0,15........0,075.......0,075....................(mol)

Na₂CO₃ + CO₂ + H₂O → 2NaHCO₃

0,025........0,025...................0,05..............(mol)

Suy ra:  

$C_{M_{NaHCO_3}} = \dfrac{0,05}{0,1} = 0,5M$
$C_{M_{Na_2CO_3}} = \dfrac{0,075 - 0,025}{0,1} = 0,5M$

b)

$NaOH + HCl \to NaCl + H_2O$
$n_{HCl} = n_{NaOH} = 0,15(mol)$
$m_{dd\ HCl} = \dfrac{0,15.36,5}{25\%} = 21,9(gam)$

1.n_CO2=0,1 (mol ) 

TH1: Số mol của CO₂ dư => Khối lượng muối khan tối đa tạo được là:

m_muối=0,1.84=8,4<9,5 (loại ) 

TH2: CO₂ hết 

Gọi số mol CO₂ tạo muối Na2CO3;NaHCO3 lần lượt là x, y

2NaOH+CO2→Na2CO3+H2O

NaOH+CO2→NaHCO3

Ta có : \(\left\{{}\begin{matrix}x+y=0,1\\106x+84y=9,5\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,05\\y=0,05\end{matrix}\right.\)

⇒n_NaOH=2.0,05+0,05=0,15 (mol)

⇒CM_NaOH=\(\dfrac{0,15}{0,1}\)=1,5M

Câu 2 thật ra anh thấy chưa chặt chẽ nha!

2. Vì CO2 bị hấp thụ hoàn toàn

=> CO2 hết, NaOH dư

nCO2 = 0,1 (mol)

CO2 + 2NaOH -------> Na2CO3 + H2O

\(n_{Na_2CO_3}=n_{CO_2}=0,1\left(mol\right)\)

=> \(m_{Na_2CO_3}=0,1.106=10,6\left(g\right)\)

a, Ta có: \(n_{SO_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)

\(n_{KOH}=\dfrac{44,8}{56}=0,8\left(mol\right)\)

\(\Rightarrow\dfrac{n_{KOH}}{n_{SO_2}}=1,3333\)

⇒ Dd sau pư gồm: K₂SO₃ và KHSO₃.

b, PT: \(SO_2+2KOH\rightarrow K_2SO_3+H_2O\)

\(SO_2+KOH\rightarrow KHSO_3\)

Giả sử: \(\left\{{}\begin{matrix}n_{K_2SO_3}=x\left(mol\right)\\n_{KHSO_3}=y\left(mol\right)\end{matrix}\right.\)

Theo PT: \(\left\{{}\begin{matrix}x+y=0,6\\2x+y=0,8\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}x=0,2\left(mol\right)\\y=0,4\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}m_{K_2SO_3}=0,2.158=31,6\left(g\right)\\m_{KHSO_3}=0,4.120=48\left(g\right)\end{matrix}\right.\)

Bạn tham khảo nhé!

\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

\(m_{dd.NaOH}=50.1,28=64\left(g\right)\)

=> \(n_{NaOH}=\dfrac{64.10\%}{40}=0,16\left(mol\right)\)

Xét tỉ lệ: \(\dfrac{n_{NaOH}}{n_{CO_2}}=\dfrac{0,16}{0,1}=1,6\)

=> Tạo ra muối Na₂CO₃ và NaHCO₃

PTHH: 2NaOH + CO₂ --> Na₂CO₃ + H₂O

             0,16--->0,08---->0,08

            Na₂CO₃ + CO₂ + H₂O --> 2NaHCO₃

               0,02<---0,02------------->0,04

=> \(\left\{{}\begin{matrix}m_{Na_2CO_3}=\left(0,08-0,02\right).106=6,36\left(g\right)\\m_{NaHCO_3}=0,04.84=3,36\left(g\right)\end{matrix}\right.\)

m_{dd sau pư} = 0,1.44 + 64 = 68,4 (g)

\(\left\{{}\begin{matrix}C\%_{Na_2CO_3}=\dfrac{6,36}{68,4}.100\%=9,3\%\\C\%_{NaHCO_3}=\dfrac{3,36}{68,4}.100\%=4,9\%\end{matrix}\right.\)