\(n_{H_2S}=0,08\left(mol\right),n_{OH^-}=0,1.0,05+0,1.0,08=0,013\left(mol\right)\)

T=\(\dfrac{0,013}{0,08}=0,1625\)=> Tạo 1 muối HS- , H2S dư

Muối gồm KHS và NaHS

=> \(m_{muối}=0,1.0,05.56+0,1.0,08.72=0,856\left(g\right)\)

\(n_{H_2S}=\dfrac{0.672}{22.4}=0.03\left(mol\right)\)

\(a.\)

\(n_{NaOH}=0.75\cdot0.1=0.075\left(mol\right)\)

\(T=\dfrac{0.075}{0.03}=2.5>2\)

=> Tạo muối trung hòa

\(2NaOH+H_2S\rightarrow Na_2S+H_2O\)

\(0.06............0.03.........0.03\)

\(m_{Na_2S}=0.03\cdot78=2.34\left(g\right)\)

\(b.\)

\(n_{NaOH}=0.42\cdot0.1=0.042\left(mol\right)\)

\(T=\dfrac{0.042}{0.03}=1.4\)

=> Tạo 2 muối

\(n_{Na_2S}=a\left(mol\right),n_{NaHS}=b\left(mol\right)\)

\(\left\{{}\begin{matrix}2a+b=0.042\\a+b=0.03\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}a=0.012\\b=0.018\end{matrix}\right.\)

\(m_{Muối}=0.012\cdot78+0.018\cdot56=1.944\left(g\right)\)

\(n_{H_2S}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\\ n_{NaOH}=0,25.2=0,5\left(mol\right)\)

Xét \(T=\dfrac{0,5}{0,4}=1,25\) => Tạo cả 2 muối Na₂S và NaHS

PTHH: 

2NaOH + H₂S ---> Na₂S + 2H₂O

0,5------->0,25------>0,25

Na₂S + H₂S ---> 2NaHS 

0,15<--0,15----->0,3

=> m_muối = 0,3.56 + (0,25 - 0,15).78 = 24,6 (g)

\(n_{CO_2}=\dfrac{4.48}{22.4}=0.2\left(mol\right)\)

\(n_{NaOH}=\dfrac{8}{40}=0.2\left(mol\right)\)

\(T=\dfrac{0.2}{0.2}=1\)

\(\Rightarrow\text{Tạo muối axit}\)

\(NaOH+CO_2\rightarrow NaHCO_3\)

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

\(m_{NaHCO_3}=0.2\cdot84=16.8\left(g\right)\)

Ta có: \(n_{CO_2}=0,2\left(mol\right)\)

\(n_{NaOH}=\dfrac{8}{40}=0,2\left(mol\right)\)

\(\Rightarrow\dfrac{n_{NaOH}}{n_{CO_2}}=1\) ⇒ Pư tạo muối NaHCO₃.

PT: \(CO_2+NaOH\rightarrow NaHCO_3\)

___0,2________________0,2 (mol)

⇒ m_NaHCO3 = 0,2.84 = 16,8 (g)

Bạn tham khảo nhé!

\(\dfrac{nNaOH}{nCO2}=\dfrac{\dfrac{8}{40}}{\dfrac{4,48}{22,4}}=1\)=>tạo muối NaHCO3

pthh CO2+NaOH->NaHCO3=>nNaHCO3=NCO2=0,2mol

=>mNaHCO3=0,2.84=16,8 g

Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=\dfrac{5,04}{22,4}=0,225\left(mol\right)\\n_{NaOH}=0,25\cdot1,75=0,4375\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\) Tạo 2 muối

PTHH: \(CO_2+NaOH\rightarrow NaHCO_3\)

              a______a________a           (mol)

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

              b______2b________b          (mol)

Ta lập được HPT \(\left\{{}\begin{matrix}a+b=0,225\\a+2b=0,4375\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}a=0,0125\\b=0,2125\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}m_{NaHCO_3}=0,0125\cdot84=1,05\left(g\right)\\m_{Na_2CO_3}=0,2125\cdot106=22,525\left(g\right)\end{matrix}\right.\)

\(n_{CO_2}=\dfrac{5,04}{22,4}=0,225\left(mol\right);n_{NaOH}=1,75\cdot0,25=0,4375\left(mol\right)\)

Ta có : \(\dfrac{n_{NaOH}}{n_{CO_2}}\approx1,9\)

=> Tạo cả hai muối trung hoà và axit, CO2 và NaOH đều pư hết.

PTHH:

\(CO2+2NaOH->Na2CO3+H2O\)

x             2x                   x       

\(CO2+NaOH->NaHCO3\)

y              y                  y

Theo đề ta có:

\(n_{CO2}=x+y=0,225\left(mol\right);n_{NaOH}=2x+y=0,4375\left(mol\right)\)

Giải hệ : x= 0,2125mol; y = 0,0125mol

Muối tan trong ddX là Na2CO3 và NaHCO3

\(m_{tan}=0,2125\cdot\left(23\cdot2+12+16\cdot3\right)+0,0125\cdot\left(23+1+12+16\cdot3\right)\\ =23,575\left(g\right)\)

Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=\dfrac{2,688}{22,4}=0,12\left(mol\right)\\n_{NaOH}=0,2\cdot2=0,4\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\) Tạo muối trung hòa

NaOH dư nên tính theo CO₂

Bảo toàn Cacbon: \(n_{Na_2CO_3}=n_{CO_2}=0,12\left(mol\right)\) \(\Rightarrow m_{Na_2CO_3}=0,12\cdot106=12,72\left(g\right)\)

Ta có: \(n_{CO_2}=\dfrac{2,688}{22,4}=0,12\left(mol\right)\)

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

Xét tỉ lệ: \(\dfrac{n_{NaOH}}{n_{CO_2}}=3,33\) 

⇒ Pư tạo muối trung hòa Na₂CO₃.

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

____0,12______________0,12 (mol)

\(\Rightarrow m_{Na_2CO_3}=0,12.106=12,72\left(g\right)\)

Bạn tham khảo nhé!

\(n_{H_2S}=\dfrac{8.96}{22.4}=0.4\left(mol\right)\)

\(H_2S+\dfrac{3}{2}O_2\underrightarrow{^{^{t^0}}}SO_2+H_2O\)

\(0.4.................0.4\)

\(n_{NaOH}=n_{SO_2}=0.4\left(mol\right)\)

=> Tạo muối axit

\(NaOH+SO_2\rightarrow NaHSO_3\)

\(0.4............................0.4\)

\(m_{NaHSO_3}=0.4\cdot104=41.6\left(g\right)\)