bazd axit
. CH3COO- + H2O ^ CH3COOH + OH-bazd axit . bazd axit .
• C6H5OH+ H2O -> C6H5O- + H3O*
axit bazcf
• CH3O- + H2O -> CH3OH + OH- bazd axit.
Bai 7. Viét phiTdng trinh phan tijT va phiTdng trinh ion rut gon cua cac phan vCng
sau :
a) FeS +? > FeClz +? b) HNO3 +? > CH3COOH +?
c) BăHC03)2 +? > BaC03 +? d) AlBr3 +? > A1(0H)3 +?
e) K3PO4 +? > Ag3P04 +?
f) Că0H)2 + NaHC03 )-? + CaC03+?
Gidi
a) FeS + 2HC1 > FeCh + H2St
FeS + 2H* > Fê* + HjSt
b) HNO3 + CH3C00Na > CH3COOH + NaN03 H* + CH3COO- > CH3COOH H* + CH3COO- > CH3COOH
c) BăHC03)2 + Bă0H)2 > 2BaC03i + 2H2O
Bâ* + HCO3 + OH" > BaC03i + H2O
d) AlBrj + 3NaOH > Al(OH)34' + 3NaBr
Al'* + 30H- > Al(0H)3i
e) K3PO4 + 3AgN03 > Ag3P04^ + 3KNO3
3Ag* + P 0 | - > Ag3P04i
f) CăOH)2 + 2NaHC03 > Na2C03 + CaC03^ + 2H2O
Phan d?ng va phtfOng phap g\i\a hQC 11 V6 c d - D5 Xuan Hang
Bai 8. Cho mot it phenolphetalein vao dung djch amoniac loang chiJa a mol N H ,
dxidc dung dich A c6 maụ H o i m^u cua dung dich bién đi nhÚ the nao trong
til'ng trUdng hdp.
a) Them a mol H C l vi\ dung djch Ạ
b) Them ^ mol AICI3 v^o dung djch Ạ Viet cac phuTcfng trinh phan uTng xdy ra (dang ion thu gon)? Giai thich?
(TS DH Van Lana, khoi B)
Gidi
a) Phifdng tnnh phan ufng : NH3 + HCl > NH4CI (adsbygoogle = window.adsbygoogle || []).push({});
NHj + H^ > N H j
Do do dung djch A chuy6'n sang khong mau vi muoi NH4CI la mot axit c6 pH < 7.
b) A I C I 3 + 3 N H 3 + 3 H 2 O > Al(0H)3i + 3 N H 4 C I
Al^^ + 3NH3 + 3 H 2 O > Al(0H)3i + 3 N H ^
Do do dung djch A chuyen sang khong maụ V i N H 4 C I va AICI3 dcu la nhufng axit c6 pH < 7.
Dang 4.