a) \(NaOH+CO_2\rightarrow NaHCO_3\)

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

PTHH: NaOH + CO₂ --> NaHCO₃

_______0,05<---0,05------>0,05______(mol)

=> Vdd = \(\frac{0,05}{1}=0,05\left(l\right)\)

c) \(C_{M\left(NaHCO_3\right)}=\frac{0,05}{0,05}=1M\)

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

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

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

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

\(n_{H_2SO_4}=0,4\cdot1=0,4mol\)

\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+H_2O\)

 0,8              0,4

\(V_{NaOH}=\dfrac{0,8}{0,5}=1,6l\)

\(n_{H_2SO_4}=0.4\cdot1=0.4\left(mol\right)\)

\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\)

\(0.8.............0.4..............0.4\)

\(V_{dd_{NaOH}}=\dfrac{0.8}{0.5}=1.6\left(l\right)\)

\(V_{dd}=0.4+1.6=2\left(l\right)\)

\(C_{M_{Na_2SO_4}}=\dfrac{0.4}{2}=0.2\left(M\right)\)

\(a)2NaOH+CO_2\rightarrow Na_2CO_3+H_2O\\ b)n_{CO_2}=\dfrac{1,1}{44}=0,025mol\\ n_{NaOH}=0,025.2=0,05mol\\ V_{ddNaOH}=\dfrac{0,05}{1,2}=\dfrac{1}{24}\approx0,04l\)

Giúp mk với . mk cần gấp . cảm ơn trước

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

\(a,H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O\\ n_{H_2SO_4}=1.0,4=0,4\left(mol\right)\\ n_{NaOH}=0,4.2=0,8\left(mol\right)\\ b,V_{ddNaOH}=\dfrac{0,8}{0,5}=1,6\left(l\right)\\ c,n_{Na_2SO_4}=n_{H_2SO_4}=0,4\left(mol\right)\\ V_{ddNa_2SO_4}=0,4+1,6=2\left(l\right)\\ C_{MddNa_2SO_4}=\dfrac{0,4}{2}=0,2\left(M\right)\)