a)\(n_{CO_2}=\dfrac{3,136}{22,4}=0,14\left(mol\right);n_{NaOH}=\dfrac{12,8}{40}=0,32\left(mol\right)\)

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

Mol:          0,14          0,28           0,14

Ta có:\(\dfrac{0,14}{1}< \dfrac{0,32}{2}\) ⇒ CO₂ pứ hết,NaOH dư

⇒ m_{NaOH dư}=(0,32-0,28).40=1,6 (g)

b) \(m_{Na_2CO_3}=0,14.106=14,84\left(g\right)\)

\(2NaOH+CO_2 \to Na_2CO_3+H_2O\\ n_{CO_2}=\frac{1,588}{22,4}=0,07(mol)\\ n_{NaOH}=\frac{6,4}{40}=0,16(mol)\\ 0,07<\frac{0,16}{2}=0,08\\ CO_2 < NaOH\\ a/ \\ \text{NaOH dư}\\ m_{NaOH du}=(0,16-0,07.2).40=0,8(g)\\ b/ \\ n_{Na_2CO_3}=n_{NaOH}=0,07(mol)\\ m_{Na_2CO_3}=0,07.106=7,42(g)\)

a) \(n_{CO_2}=\dfrac{1,568}{22,4}=0,07\left(mol\right)\)

\(n_{NaOH}=\dfrac{6,4}{40}=0,16\left(mol\right)\)

PTHH: 2NaOH + CO₂ --> Na₂CO₃ + H₂O

Xét tỉ lệ \(\dfrac{0,16}{2}>\dfrac{0,07}{1}\) => NaOH dư, CO₂ hết

PTHH: 2NaOH + CO₂ --> Na₂CO₃ + H₂O

             0,14<---0,07------->0,07

=> \(m_{Na_2CO_3}=0,07.106=7,42\left(g\right)\)

b)

\(m_{NaOH\left(dư\right)}=6,4-0,14.40=0,8\left(g\right)\)

giúp mình vs :))

a) \(n_{CO_2}=\dfrac{1,568}{22,4}=0,07\left(mol\right)\)

\(n_{NaOH}=\dfrac{6,4}{40}=0,16\left(mol\right)\)

PTHH: 2NaOH + CO₂ --> Na₂CO₃ + H₂O

Xét tỉ lệ \(\dfrac{0,16}{2}>\dfrac{0,07}{1}\) => NaOH dư, CO₂ hết

PTHH: 2NaOH + CO₂ --> Na₂CO₃ + H₂O

             0,14<---0,07------->0,07

=> \(m_{Na_2CO_3}=0,07.106=7,42\left(g\right)\)

b)

\(m_{NaOH\left(dư\right)}=6,4-0,14.40=0,8\left(g\right)\)

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

  0,07       0,14         0,07          0,07

\(nCO_2=\dfrac{1,568}{22,4}=0,07\left(mol\right)\)

\(nNaOH=\dfrac{6,4}{23+17}=0,16\left(mol\right)\)

LTL : \(\dfrac{0,07}{1}< \dfrac{0,16}{2}\)

=> NaOH dư , CO2 đủ

\(nNaOH_{\left(dư\right)}=0,16-0,14=0,02\left(mol\right)\)

\(mNaOH_{\left(dư\right)}=0,02.40=0,8\left(g\right)\)

\(n_{CO_2}=\dfrac{1,568}{22,4}=0,07\left(mol\right);n_{NaOH}=\dfrac{6,4}{40}=0,16\left(mol\right)\)

PTHH: CO₂ + 2NaOH → Na₂CO₃ + H₂O

Mol:     0,07       0,14          0,07

Ta có: \(\dfrac{0,07}{1}< \dfrac{0,16}{2}\) ⇒ CO₂ hết, NaOH dư

\(m_{Na_2CO_3}=0,07.106=7,42\left(g\right)\)

\(m_{NaOHdư}=\left(0,16-0,14\right).40=0,8\left(g\right)\)

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

\(n_{CO_2}=\dfrac{1,7353}{24,79}=0,07\left(mol\right)\)

\(n_{NaOH}=\dfrac{64}{40}=0,16\left(mol\right)\)

Xét tỉ lệ: \(\dfrac{0,07}{1}< \dfrac{0,16}{2}\), ta được NaOH dư.

Theo PT: \(n_{NaOH\left(pư\right)}=2n_{CO_2}=0,14\left(mol\right)\)

\(\Rightarrow n_{NaOH\left(dư\right)}=0,16-0,14=0,02\left(mol\right)\)

\(\Rightarrow m_{NaOH\left(dư\right)}=0,02.40=0,8\left(g\right)\)

b, \(n_{Na_2CO_3}=n_{CO_2}=0,07\left(mol\right)\)

\(\Rightarrow m_{Na_2CO_3}=0,07.106=7,42\left(g\right)\)

a, \(n_{CO_2}=\dfrac{1,7353}{24,79}=0,07\left(mol\right);n_{NaOH}=\dfrac{6,4}{40}=0,16\left(mol\right)\)

PTHH: CO₂ + 2NaOH → Na₂CO₃ + H₂O

Mol:      0,07      0,07          0,07

Ta có: \(\dfrac{0,07}{1}< \dfrac{0,16}{2}\) ⇒ CO₂ hết, NaOH dư

b, \(m_{Na_2CO_3}=0,07.106=7,42\left(g\right)\)

c, \(m_{NaOHdư}=\left(0,16-0,07\right).40=3,6\left(g\right)\)

 \(\Rightarrow m_{muối}=7,42+3,6=11,02\left(g\right)\)

Theo đề ta có : \(\left\{{}\begin{matrix}nCO2=\dfrac{3,36}{22,4}=0,15\left(mol\right)\\nNaOH=\dfrac{12,8}{40}=0,32\left(mol\right)\end{matrix}\right.\)

a) PTHH :

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

0,3mol.............0,15mol......0,15mol

Ta có : \(\dfrac{0,32}{2}>\dfrac{0,15}{1}=>nNaOH\left(dư\right)\) ( tính theo nCO2)

=> mNaOH(dư) = 0,02.40 = 0,8(g)

b) Khối lượng muối thu được là :

mNa2CO3 = 0,15.106 = 15,9(g)