Đáp án:
`A.Na_2CO_3` và `NaHCO_3`
Giải thích các bước giải:
`n_{CO_2}=\frac{4,48}{ 22,4}=0,2(mol)`
`n_{NaOH}=0,3.1=0,3(mol)`
Ta có `1<T=\frac{n_{NaOH}}{n_{CO_2}}=\frac{0,3}{0,2}=1,5<2`
` \to` Tạo muối `NaHCO_3` và `Na_2CO_3`
n$SO_{2}$ = 4,48 : 22,4 = 0,2 (mol)
nNaOH = 0,3.1 = 0,3 (mol)
Vì $\frac{nNaOH}{nCo2}$ =$\frac{0,3}{0,2}$ = 1,5
⇒ tạo 2 muối $Na_{2}$$CO_{3}$ và $NaHCO_{3}$
Vậy chọn A
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