M va sdm ol mudi axit trong h6n hgp ban daụ
b) So mol HNO3 da phan ufng.
a i 30. H o a t a n h o a n t o a n 1,97 gam h o n h g p Z n , M g , Fe t r o n g m o t li/gng VLfa du d u n g d i c h H C l , t h u diigc 1,008 l i t k h i (or d k t c ) va d u n g d i c h Ạ
C h i a d u n g d i c h A t h a n h 2 p h a n k h o n g deu nhaụ
Phan 1: Cho k e t t u a h o a n t o a n v6i m o t l i / g n g vCra dii d u n g d i c h N a O H
0,06 M t h i can 300 m l . K e t t i i a dem r\ia sach, n u n g d e n k h o i Itfgng
k h o n g đi t h i t h u dirge 0,562 gam chat r ^ n .
Phan 2: Cho p h a n ufng vdri N a O H dtf r o i t i e n h a n h n h i i p h a n 1 t h i thu
diigc a g a m chat r a n .
- T i n h k h o i Itfgng t i f n g k i m l o a i .
lai 31. Khuf 3,48 g a m m o t o x i t k i m l o a i M can d u n g 1,344 l i t H2 (dktc).
T o a n bg l u g n g k i m l o a i M t h u difgc cho tac d u n g vdii d u n g d i c h H C l d\i
cho 1,008 H2 (dktc). T i m k i m l o a i M va oxit k i m l o a i M .
lai 32. H o a t a n m g a m M g vao 1 l i t dung dich Fe(N03)2 0 , 1 M v ^ Cu(N03)2
0 , 1 M . Lgc l a y dung dich X. T h e m N a O H dtf vao d u n g d i c h X, t h u dẳc k e t t i i a Y , n u n g Y ngoai k h o n g k h i den k h o i l u g n g k h o n g d o i , c6n lá
10 gam chat r a n Z. T i n h so m o l m u o i Fe(N03)2 da p h a n ufng.
tai 33. Cho a gam h o n hgp hot cac k i m loai N i va Cu vao dung dich AgNOs di/, k h u a y k i m o t t h d i g i a n cho den k h i p h a n ufng k e t thuc. Ngi/oii t a t h ^
di/gc 54 gam k i m loaị M a t khac, cung cho a gam h o n hgp hot cac kin^ loai t r e n vao dung dich CUSO4 dii, k h u a y k i cho den k h i p h a n ufng kS* thuc. Ngiiori ta t h u di/gc k i m loai c6 k h o i Itfgng b a n g (a + 0,5) gam.
28 BOI OUdNG HOA HOC 12
a) V i e t cac phuong t r i n h hoa hoc ciia p h a n ufng t r o n g cac t h i nghiSm t r e n .