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BÀI TẬP TRẮC NGHIỆM HÓA ĐẠI CƯƠNG VÀ VÔ CƠ CẨM NANG DÙNG LUYỆN THI THPTQG CHẤT LƯỢNG CAO (COLOR BOOK)

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3<br />

Chú ý<br />

CO 2 2CO 3,<br />

2 2<br />

CO 2<br />

2<br />

H 2CO 3<br />

CO 2 + H 2O<br />

2<br />

CO 2 + H 2 O H 2 CO 3<br />

CO 2 + OH HCO 3<br />

CO 2 + 2OH CO 32 + 2H 2 O<br />

4<br />

CO 2 3<br />

3 2 2 và<br />

OH<br />

OH<br />

CO 2<br />

⇀ HCO 3 CO<br />

2<br />

↽<br />

↽ ⇀ 3<br />

H<br />

H<br />

tính axit<br />

VD4: NaHCO 3 + HCl NaCl + H 2 O + CO 2 .<br />

NaHCO 3 + NaOH Na 2 CO 3 + H 2 O.<br />

VD5: Na 2 CO 3 + 2HCl 2NaCl + H 2 O + CO 2 .<br />

4 +<br />

VD6: 2NaHCO t o<br />

3 Na 2 CO 3 + CO 2 + H 2 O.<br />

2.<br />

Na 2 CO 3<br />

o<br />

t<br />

CaCO t o<br />

3 CaO + CO 2 .<br />

4<br />

251

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