3.
1 CO2+2KOH->K2CO3+H2O
0,075..................0,075
CM K2Co3=0,075/0,25=0,3M
2 mdd NaOH=1,3.500=650g
mNaOH=650.25/100=162,5g =>nNaOH=4,0625
nCO2=11,2/22,4=0,5mol
nNaOH/nCo2=4,0625/0,5=8,125. Vậy pứ tạo muối TH, NaOH dư
CO2+2NaOH->Na2CO3+h2O
0,5.....................0,5
mNa2CO3=106.0,5=53g
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