\(\text{nH2SO4=1.0,2=0,2(mol)}\)
a) PTHH:
H2SO4 + 2NaOH \(\rightarrow\) Na2SO4 + 2H2O
0,2________0,2 __________________ (mol)
b)\(\text{mNaOH = 0,2.(23+16+1)=8(g)}\)
m dd NaOH=\(\frac{8}{20}\).100=40(g)
c) nNaOH= 2.0,15=0,3(mol)
nCO2= \(\frac{0,86}{22,4}\)=0,04(mol)
PTHH:
2 NaOH + CO2 \(\rightarrow\)Na2CO3 + H2O
0,08_______0,04____ 0,04 ____ (mol)
\(\rightarrow\)NaOH dư ; CO2 hết
Cm NaOH=\(\frac{0,22}{\text{0,86+0,15}}\)=0,22M
Cm Na2CO3 = \(\frac{0,04}{\text{0,86+0,15}}\)=0,04M