D. N a O H + H C l N a C l + HgỌ
J C a u 23: Cho hon hgp k i m loai M g , Zn, Fe vao dung dich chiJa AgNOs va • Cu(N03)2.. Sau k h i phan uTng xay ra hoan toan thu dirge dung dich X • gom 3 muoi va chat rSn Y gom ba k i m loaị Ba muoi t r o n g X 1^
I Ạ Mg(N03)2, Fe(N03)3, AgNOg B. Mg(N03)2, Zn(N03)2, Cu(N03)2 • C. Mg(N03)2, Zn(N03)2, Fe(N03)3 D. Mg(N03)2, Zn(N03)2, Fe(N03)2.
Wki 24: Cho 6,4 gam dung dich rirgu A c6 nong do 71,875% tac dung v d i * lirgng dir Na t h u dirge 2,8 l i t H 2 dieu k i $ n chuan. So nguyen tiJf H c6
trong eong thufc phan tuf ri/gu A la
B a i 2 5 : Cho cac cong thiJc phan tuT sau: C3H7CI, CgHgO v a C3H9N. H a y cho biet suf sSp xep n^o sau day theo chieu t a n g dan so lirang dong
phan ling vdi cac cong thdc phan tijf dỏ
Ạ C3H7CI < CaHsO < C3H9N B. CsHgO < C3H9N < C3H7CI C. CaHsO < C3H7CI < C3H9N D. C3H7CI < C3H9N < CgHsỌ
B a i 26: Cho 2,46 gam h6n hop gom HCOOH, CH3COOH, CgHsOH,
H2NCH2COOH tac dung vCfa du vdi 40 m l dung dich N a O H I M . Tong
k h o i liiOng muoi k h a n t h u diiOc sau k h i phan ufng la
Ạ 3,52 gam B. 6,45 gam C. 8,42 gam D. 3,34 gam.
B a i 27: Day cac chat deu l a m m a t mau dung dich thuoc t i m la Ạ E t i l e n , axetilen, andehit fomic, toluen
B. Axeton, etilen, andehit axetic, cumen C. Benzen, b u t - l - e n , axit fomic, p - x i l e n D. Xiclobutan, b u t - l - i n , m - x i l e n , axit axetic.
B a i 28: Dot chay 1,6 gam m o t este E dan chdc diroc 3,52 gam CO2 va 1,152 gam H2Ọ Neu cho 10 gam E tac dung v d i 150ml dung dich
N a O H I M , CO can dung dich sau phan dng thu daoc 16 gam chat rAn
khan. Vay cong thiJc cua axit tao nen este t r e n c6 the la Ạ CH2 = C H - C O O H B. CH2 = C ( C H 3 ) - C 0 0 H