a, \(Na_2CO_3+2HCl\rightarrow2NaCl+CO_2+H_2O\)

b, \(n_{CO_2}=\dfrac{0,896}{22,4}=0,04\left(mol\right)\)

Theo PT: \(n_{HCl}=2n_{CO_2}=0,08\left(mol\right)\)

\(\Rightarrow C_{M_{HCl}}=\dfrac{0,08}{0,2}=0,4\left(M\right)\)

c, \(n_{Na_2CO_3}=0,04\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{Na_2CO_3}=\dfrac{0,04.106}{10}.100\%=42,4\%\\\%m_{NaCl}=57,6\%\end{matrix}\right.\)

PTHH\(Na_2CO_3+2HCl\rightarrow2NaCl+H_2O+CO_2\)

tl............1................2.............2.............1.............1..(mol

br     0,1.................0,2......................................0,1(mol)

NaCl không phản ứng đc vsHCl

b)\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

\(C_{MHCl}=\dfrac{0,2}{0,4}=0,5\left(M\right)\)(đổi 400ml=0,4(l))

c)\(Tacom_{Na_2CO_3}=0,1.106=10,6\left(g\right)\)

\(\Rightarrow\%m_{Na_2CO_3}=\dfrac{10,6}{20}.100=53\%\)

\(\Rightarrow\%mNaCl=100\%-53\%=47\%\)

chj kb vs em nha em ib rồi ạ

Na 2 CO 3  + 2HCl → 2NaCl +  H 2 O + CO 2

n khi = n CO 2  = 0,448/22,4 = 0,02 mol;  n HCl  = 0,02.2/1 = 0,04 mol

n Na 2 CO 3  = 0,02.1/1 = 0,02 (mol) →  m Na 2 CO 3  = 0,02 x 106 = 2,12g

% m Na 2 CO 3  = 2,12/5 . 100% = 42,4%

% m NaCl  = 100% - 42,4% = 57,6%

a)

$n_{CO_2} = \dfrac{0,224}{22,4} = 0,01(mol)$
\(CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)

0,01             0,02                        0,01                            (mol)

$C_{M_{HCl}} = \dfrac{0,02}{0,1} = 0,2M$

b)

$\%m_{CaCO_3} = \dfrac{0,01.100}{1,5}.100\% = 66,67\%$

$\%m_{CaSO_4} = 100\% -66,67\% = 33,33\%$