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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 2SO 4<br />

H 2 SO 4 .nSO 3<br />

2SO 4 :<br />

H 2 SO 4 .nSO 3 + nH 2 O (n + 1) H 2 SO 4<br />

VD1: 3<br />

(A) H 2 SO 4 .SO 3 . (B) H 2 SO 4 .2SO 3 .<br />

(C) H 2 SO 4 .3SO 3 . (D) H 2 SO 4 .4SO 3 .<br />

2SO 4 .nSO 3<br />

80n<br />

3 là .100%<br />

80n 98<br />

71 % n = 3.<br />

2SO 4 .nSO 3 .<br />

(A) 32,65 %. (B) 35,96 %.<br />

(C) 37,86 %. (D) 23,97 %.<br />

n NaOH = 0,2.0,15 = 0,03 (mol).<br />

2SO 4 .nSO 3 + nH 2 O (n + 1) H 2 SO 4 (1)<br />

H 2 SO 4 + 2NaOH Na 2 SO 4 + 2H 2 O (2)<br />

1<br />

n n 0,015 (mol).<br />

H2SO<br />

4 NaOH<br />

2<br />

nH2SO<br />

n 1 0,03<br />

4<br />

n 1 0,015<br />

oleum<br />

n = 1 H 2 SO 4 .SO 3<br />

35,96 %.<br />

1<br />

199

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