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Bµi tËp ngµy 15/12/07
Bµi1.Mét hçn hîp X gåm Al,Mg cho vµo dd chøa hçn hîp 2 muèi Cu(NO 3)2 vµ AgNO3 l¾c ®Òu
®Õn p xong thu ®îc hçn hîp muèi r¾n Y chøa 3 kim lo¹i vµ mét dd Z cã 2 muèi
a.X¸c ®Þnh thµnh phÇn c¸c chÊt trong Y vµ Z
b.T¸ch rêi tõng kim lo¹i ra khái nhau trong Y .
c.T¸ch rêi tõng muèi ra khái nhau trong Z.
Bµi2.Cã thÓ dïng nø¬c vµ ph¬ng ph¸p vËt lý ®Ó ph©n biÖt c¸c chÊt : KOH , FeCl 3 , MgSO4 ,
FeSO4 ,NH4Cl ,Hg(NO3)2.
Bµi3.ChØ dïng Cu vµ mét muèi tuú ý ®Ó nhËn biÕt c¸c dd sau : HCl, HNO 3, H2SO4, H3PO4.
Bµi4.ViÕt pt cho c¸c trêng hîp sau :
a.Cho dd Fe2(SO4)3 vµo dd K2CO3
b.Cho dd KHSO4 vµo dd Ba(HSO3)2
c.Cho CrO3 vµo dd Ca(OH)2
d.Hoµ Cr2O3 vµo dd HCl vµ dd KOH
e.NO2 sôc vµo dd Ba(OH)2
f.Sôc SO3 vµo dd NH3
Bµi5.8,8g hçn hîp 2 kim lo¹i Mg vµ Ca t¸c dông võa ®ñ víi 500ml dd HCl .Sau ®ã c« c¹n dd thu ® îc
hçn hîp muèi .Cho hçn hîp muèi vµo 1 lit dd chøa hçn hîp muèi Na 2CO3 0,15M vµ (NH4)2CO3 0,2M
kÕt thóc p thu ®îc 26,8g kÕt tña X vµ dd Y.
a.T×m CM cña dd HCl .<®.sè 1,2M >
b.TÝnh khèi lîng mçi kim lo¹i trong hçn hîp ®Çu.< 45.45% Mg ...>
( B¶o toµn nguyªn tè hoÆc nhãm c¸c nguyªn tö )
Bµi6.Khi nung nãng 16g bét mét oxit kim lo¹i s¾t trong èng sø cã CO ®i qua ,sau khi kÕt thóc p
khèi lîng èng gi¶m 4,8g .
1.T×m CTHH oxit s¾t
2.KhÝ ®i ra khái èng sø dÉn vµo b×nh cã chøa s½n dd NaOH 6,5% d = 1,504 g/ml .TÝnh thÓ
tÝch dd NaOH tèi thiÓu hÊp thô hÕt lîng khÝ ®i ra khái èng.
Bµi7.Ngêi ta thu ®îc 104,7g chÊt r¾n sau khi thùc hiÖn xong p nhiÖt nh«m víi mét hçn hîp bét
nh«m vµ s¨t «xit .LÊy lîng chÊt r¾n sau p cho vµo dd NaOH d th× thu ®îc 50,4g chÊt r¾n vµ 16,8
lit khÝ H2.T×m oxit.
Bµi8.Trén 200ml dd HNO3 (ddX) víi 300ml dd HNO3 (ddY) thu ®îc dd Z .BiÕt

1
dd Z t¸c dông võa
2

®ñ víi 7g CaCO3 .
a.T×m nång ®é CM cña dd Z
b.Ngêi ta cã thÓ ®iÒu chÕ dd X tõ dd Y b»ng c¸ch thªm níc vµo dd Y theo tØ lÖ thÓ tÝch VH 2O :
VddY = 3:1
T×m nång ®é mol cña dd X vµ dd Y.BiÕt sù pha trén kh«ng lµm thay ®æi ®¸ng kÓ thÓ tÝch.
Bµi9.Trén lÉn 100ml dd NaHSO4 1M víi 100ml dd NaOH 2M.T×m CM cña chÊt sau p.
Bµi10.
1.ChØ dïng níc ph©n biÖt ®îc nhãm nµo?
A.MgO,Na2O,K2O ; B.Al2O3 ,MgO ,Na ; C.P2O5,MgO, K2O ; D.SiO2 ,MgO ,FeO
2.Thµnh phÇn chÝnh cña Xim¨ng lµ:
A.CaCO3 ,Al2O3 ; B.§Êt sÐt ,®¸ v«i ,c¸t ; C.CaO,Al2O3 ; D.CaSiO3 ,Ca(AlO2)2
Bµi11.a.Ph©n biÖt c¸c chÊt sau chØ dïng mét thuèc thö. (NH 4)2SO4 , Ca(H2PO4)2 ,KCl.
b.Ph©n biÖt K2SO4 ,K2CO3 ,HCl, BaCl2 chØ b»ng mét kim lo¹i hoÆc kh«ng dïng chÊt thö
nµo.
Bµi12.ViÕt pt minh ho¹ khi cho 1 kim lo¹i vµo 1 dd muèi cã s¶n phÈm t¹o ra nh sau:
a.Muèi + Baz¬ + khÝ ; b.2muèi ; c.Duy nhÊt mét muèi

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Bai tap doi tuyen hoa 9

  • 1. Bµi tËp ngµy 15/12/07 Bµi1.Mét hçn hîp X gåm Al,Mg cho vµo dd chøa hçn hîp 2 muèi Cu(NO 3)2 vµ AgNO3 l¾c ®Òu ®Õn p xong thu ®îc hçn hîp muèi r¾n Y chøa 3 kim lo¹i vµ mét dd Z cã 2 muèi a.X¸c ®Þnh thµnh phÇn c¸c chÊt trong Y vµ Z b.T¸ch rêi tõng kim lo¹i ra khái nhau trong Y . c.T¸ch rêi tõng muèi ra khái nhau trong Z. Bµi2.Cã thÓ dïng nø¬c vµ ph¬ng ph¸p vËt lý ®Ó ph©n biÖt c¸c chÊt : KOH , FeCl 3 , MgSO4 , FeSO4 ,NH4Cl ,Hg(NO3)2. Bµi3.ChØ dïng Cu vµ mét muèi tuú ý ®Ó nhËn biÕt c¸c dd sau : HCl, HNO 3, H2SO4, H3PO4. Bµi4.ViÕt pt cho c¸c trêng hîp sau : a.Cho dd Fe2(SO4)3 vµo dd K2CO3 b.Cho dd KHSO4 vµo dd Ba(HSO3)2 c.Cho CrO3 vµo dd Ca(OH)2 d.Hoµ Cr2O3 vµo dd HCl vµ dd KOH e.NO2 sôc vµo dd Ba(OH)2 f.Sôc SO3 vµo dd NH3 Bµi5.8,8g hçn hîp 2 kim lo¹i Mg vµ Ca t¸c dông võa ®ñ víi 500ml dd HCl .Sau ®ã c« c¹n dd thu ® îc hçn hîp muèi .Cho hçn hîp muèi vµo 1 lit dd chøa hçn hîp muèi Na 2CO3 0,15M vµ (NH4)2CO3 0,2M kÕt thóc p thu ®îc 26,8g kÕt tña X vµ dd Y. a.T×m CM cña dd HCl .<®.sè 1,2M > b.TÝnh khèi lîng mçi kim lo¹i trong hçn hîp ®Çu.< 45.45% Mg ...> ( B¶o toµn nguyªn tè hoÆc nhãm c¸c nguyªn tö ) Bµi6.Khi nung nãng 16g bét mét oxit kim lo¹i s¾t trong èng sø cã CO ®i qua ,sau khi kÕt thóc p khèi lîng èng gi¶m 4,8g . 1.T×m CTHH oxit s¾t 2.KhÝ ®i ra khái èng sø dÉn vµo b×nh cã chøa s½n dd NaOH 6,5% d = 1,504 g/ml .TÝnh thÓ tÝch dd NaOH tèi thiÓu hÊp thô hÕt lîng khÝ ®i ra khái èng. Bµi7.Ngêi ta thu ®îc 104,7g chÊt r¾n sau khi thùc hiÖn xong p nhiÖt nh«m víi mét hçn hîp bét nh«m vµ s¨t «xit .LÊy lîng chÊt r¾n sau p cho vµo dd NaOH d th× thu ®îc 50,4g chÊt r¾n vµ 16,8 lit khÝ H2.T×m oxit. Bµi8.Trén 200ml dd HNO3 (ddX) víi 300ml dd HNO3 (ddY) thu ®îc dd Z .BiÕt 1 dd Z t¸c dông võa 2 ®ñ víi 7g CaCO3 . a.T×m nång ®é CM cña dd Z b.Ngêi ta cã thÓ ®iÒu chÕ dd X tõ dd Y b»ng c¸ch thªm níc vµo dd Y theo tØ lÖ thÓ tÝch VH 2O : VddY = 3:1 T×m nång ®é mol cña dd X vµ dd Y.BiÕt sù pha trén kh«ng lµm thay ®æi ®¸ng kÓ thÓ tÝch. Bµi9.Trén lÉn 100ml dd NaHSO4 1M víi 100ml dd NaOH 2M.T×m CM cña chÊt sau p. Bµi10. 1.ChØ dïng níc ph©n biÖt ®îc nhãm nµo? A.MgO,Na2O,K2O ; B.Al2O3 ,MgO ,Na ; C.P2O5,MgO, K2O ; D.SiO2 ,MgO ,FeO 2.Thµnh phÇn chÝnh cña Xim¨ng lµ: A.CaCO3 ,Al2O3 ; B.§Êt sÐt ,®¸ v«i ,c¸t ; C.CaO,Al2O3 ; D.CaSiO3 ,Ca(AlO2)2 Bµi11.a.Ph©n biÖt c¸c chÊt sau chØ dïng mét thuèc thö. (NH 4)2SO4 , Ca(H2PO4)2 ,KCl. b.Ph©n biÖt K2SO4 ,K2CO3 ,HCl, BaCl2 chØ b»ng mét kim lo¹i hoÆc kh«ng dïng chÊt thö nµo. Bµi12.ViÕt pt minh ho¹ khi cho 1 kim lo¹i vµo 1 dd muèi cã s¶n phÈm t¹o ra nh sau: a.Muèi + Baz¬ + khÝ ; b.2muèi ; c.Duy nhÊt mét muèi