\(n_{NaOH}=0,1.3=0,3\left(mol\right)\\ n_{Na_2CO_3}=n_{NaHCO_3}\Rightarrow n_{NaOH}=1,5.n_{CO_2}\\ \Leftrightarrow0,3=1,5.n_{CO_2}\\ \Leftrightarrow n_{CO_2}=0,2\left(mol\right)\\ \Rightarrow V_{CO_2\left(\text{đ}ktc\right)}=0,2.22,4=4,48\left(l\right)\)

nCO2= 2,24/22,4=0,1(mol)

nNaOH= 0,1.1=0,1(mol)

Ta có: nNaOH/nCO2=0,1/0,1=1

=> Chỉ có 1 P.ứ duy nhất tạo 1 sản phẩm muối axit NaHCO3.

PTHH: NaOH + CO2 -> NaHCO3

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

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

a.\(n_{CH_4}=\dfrac{V_{CH_4}}{22,4}=\dfrac{11,2}{22,4}=0,5mol\)

\(CH_4+2O_2\rightarrow\left(t^o\right)CO_2+2H_2O\)

0,5         1                0,5                     ( mol )

\(V_{kk}=V_{O_2}.5=\left(1.22,4\right).5=112l\)

b.\(n_{NaOH}=0,5.0,5=0,25mol\)

\(NaOH+CO_2\rightarrow NaHCO_3\)

 0,25    <   0,5                          ( mol )

 0,25                           0,25          ( mol )

\(m_{NaHCO_3}=0,25.84=21g\)    

CH4+2O2-to>CO2+2H2O

0,5-----1----------0,5 mol

n CH4=

CH4+2O2-to>CO2+2H2O

0,5-----1----------0,5 mol

n CH4=\(\dfrac{11,2}{22,4}\)=0,5 mol

=>Vkk=1.22,4.5=112l

NaOH+CO2->NaHCO3

0,25------0,25-------0,25

n NaOH=0,5.0,5=0,25 mol

=>Tạo ra muối axit, CO2 dư

=>m NaHCO3=0,25.84=21g

a+b) PTHH: \(CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\uparrow\)

Ta có: \(n_{CaCO_3}=\dfrac{10}{100}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}n_{HCl}=0,2\left(mol\right)\\n_{CO_2}=0,1\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{HCl}=0,2\cdot36,5=7,3\left(g\right)\\V_{CO_2}=0,1\cdot22,4=2,24\left(l\right)\end{matrix}\right.\)

c) Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=0,1\left(mol\right)\\n_{NaOH}=\dfrac{50\cdot40\%}{40}=0,5\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\) Tạo muối trung hòa, bazơ dư, tính theo CO₂

Bảo toàn Cacbon: \(n_{Na_2CO_3}=n_{CO_2}=0,1\left(mol\right)\) \(\Rightarrow m_{Na_2CO_3}=0,1\cdot106=10,6\left(g\right)\)

Ta có: \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)

PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)

____0,1______0,2_____0,1____0,1 (mol)

a, \(C_{M_{HCl}}=\dfrac{0,2}{0,15}=\dfrac{4}{3}\left(M\right)\)

\(V_{H_2}=0,1.22,4=2,24\left(l\right)\)

b, \(FeCl_2+2NaOH\rightarrow2NaCl+Fe\left(OH\right)_2\)

Theo PT: \(n_{NaOH}=2n_{FeCl_2}=0,2\left(mol\right)\)

\(\Rightarrow V_{NaOH}=\dfrac{0,2}{2}=0,1\left(l\right)\)

PTHH: \(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)

Ta có: \(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}n_{HCl}=0,2\left(mol\right)\\n_{FeCl_2}=0,1\left(mol\right)=n_{H_2}\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}V_{H_2}=0,1\cdot22,4=2,24\left(l\right)\\m_{FeCl_2}=0,1\cdot127=12,7\left(g\right)\\C_{M_{FeCl_2}}=\dfrac{0,1}{0,1}=1\left(M\right)\\C_{M_{HCl}}=\dfrac{0,2}{0,1}=2\left(M\right)\end{matrix}\right.\)