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

b) \(n_{CO_2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

Theo PT: \(n_{NaOH}=2n_{CO_2}=0,1\left(mol\right)\)

=> \(CM_{NaOH}=\dfrac{0,1}{0,1}=1M\)

c) Sửa đề D_NaOH = 1,2g/ml

 \(m_{ddsaupu}=0,05.44+100.1,2=122,2\left(g\right)\)

\(n_{Na_2CO_3}=n_{CO_2}=0,05\left(mol\right)\)

=> \(C\%_{Na_2CO_3}=\dfrac{0,05.106}{122,2}.100=4,34\%\)

\(n_{CO2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

a) Pt : \(CO_2+2KOH\rightarrow K_2CO_3+H_2O\)

\(n_{KOH}=2n_{CO2}=2.0,05=0,1\left(mol\right)\Rightarrow C_{MddKOH}=\dfrac{0,1}{0,1}=1M\)

1.

a, \(n_{CO_2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

PTHH: CO₂ + 2NaOH → Na₂CO₃ + H₂O

Mol:     0,05       0,1

b, \(C_{M_{ddNaOH}}=\dfrac{0,1}{0,1}=1M\)

2.

a, \(m_{HCl}=200.7,3\%=14,6\left(g\right)\Rightarrow n_{HCl}=\dfrac{14,6}{36,5}=0,4\left(mol\right)\)

PTHH: CuO + 2HCl → CuCl₂ + H₂O

Mol:      0,2         0,4           0,2

b,\(m_{CuO}=0,2.80=16\left(g\right)\)

c, \(C\%_{ddCuCl_2}=\dfrac{0,2.135.100\%}{16+200}=12,5\%\)    

mHCl=200.7,3%=14,6(g)⇒nHCl=14,636,5=0,4(mol)mHCl=200.7,3%=14,6(g)⇒nHCl=14,636,5=0,4(mol)

PTHH: CuO + 2HCl → CuCl₂ + H₂O

Mol:      0,2        0,4          0,2

b,mCuO

Chọn A

n NaOH = 2 n CO 2  = 1,12x2 /22,4 = 0,1 (mol)

Nồng độ mol của dung dịch NaOH là 1M.

CO 2 + 2 NaOH → Na 2 CO 3 + H 2 O

Ta có n_CO2 = \(\dfrac{1,12}{22,4}\) = 0,05 ( mol )

a, CO₂ + 2NaOH \(\rightarrow\) Na₂CO₃ + H₂O

0,05\(\rightarrow\) 0,1

b, 100 ml = 0,1 l

C_M = n : V = 0,1 : 0,1 = 1M

a) 2NaOH + Cl₂ --> NaCl + NaClO + H₂O

b) \(n_{Cl_2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)

PTHH: 2NaOH + Cl₂ --> NaCl + NaClO + H₂O

              0,1<----0,05--->0,05----->0,05

=> \(V_{ddNaOH}=\dfrac{0,1}{1}=0,1\left(l\right)\)

c) 

\(\left\{{}\begin{matrix}C_{M\left(NaCl\right)}=\dfrac{0,05}{0,1}=0,5M\\C_{M\left(NaClO\right)}=\dfrac{0,05}{0,1}=0,5M\end{matrix}\right.\)