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Data Sheet 4 - Chemistry for engineers | Trường Đại học Quốc tế, Đại học Quốc gia Thành phố HCM

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Môn: Chemistry for engineers (CH011IU) 31 tài liệu

Trường: Trường Đại học Quốc tế, Đại học Quốc gia Thành phố Hồ Chí Minh 696 tài liệu

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International University, Vietnam National University - HCMC
GENERAL CHEMISTRY LABORATORY
11
DATA SHEET
EXPERIMENT 4: CHEMICAL EQUILIBRIUM
Group: _____________ Section: ______4 ______ ________ Date: ______
Group members: _______________________________
_______________________________
_______________________________
_______________________________
Instructor’s/TA’s signature and comments:
Expt. 1
Expt. 4
Expt. 2
Expt. 5
Expt. 3
Approval
International University, Vietnam National University - HCMC
GENERAL CHEMISTRY LABORATORY
12
1. ACID/BASE EQUILIBRIA
Equilibrium System: 2CrO
4
2
(aq)
+ 2H
+
(aq)
⇌ Cr
2
O
7
2
(aq)
+ H
2
O
(l)
Description of
conditions
Predicted outcome
Initial solution
+ Conc. HCl
+ 6 N NaOH
2. EQUILIBRIA OF ACID/BASE INDICATORS
Equilibrium System: H(MV)
(aq)
+ H
2
O
(l)
⇌ H
3
O
+
(aq)
+ MV
(aq)
Addition
Predicted outcome
Observation
None (control)
6 M HCl
6 M NaOH
6 M HCl
International University, Vietnam National University - HCMC
GENERAL CHEMISTRY LABORATORY
13
3. COMPLEX ION FORMATION
Equilibrium System: Fe
3+
(aq)
+ SCN
(aq)
⇌ [Fe(SCN)]
2+
(aq)
Addition
Predicted outcome
Observation
None
(control)
0.01M FeCl
3
0.01 M KSCN
6M NaOH
Cold
Hot
0.1M AgNO
3
International University, Vietnam National University - HCMC
GENERAL CHEMISTRY LABORATORY
14
4. EQUILIBRIA OF PRECIPITATION REACTIONS
Equilibrium System: Ca
2+
(aq)
+ C
2
O
4
2
(aq)
⇌ CaC
2
O
4(s)
Addition
Predicted outcome
Observation
Test tube 1:
0.1 M Na
2
C
2
O
4
Test tube 2:
+ 0.1 M
H C
2 2
O
4
Test tube 2:
+ 6 M HCl
Test tube 2:
+ 6 M NH
4
OH
5. TEMPERATURE EFFECTS ON EQUILIBRIA
Equilibrium System:
Co(H
2
O)6
2+
(aq)
+ 4Cl
(aq)
⇌
CoCl
4
2
(aq)
+ 6H
2
O
(l)
Description of
conditions
Predicted outcome
Observation
Nothing
changed
(control)
Hot water bath
Ice-water bath

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International University, Vietnam National University - HCMC 11
GENERAL CHEMISTRY LABORATORY DATA SHEET
EXPERIMENT 4: CHEMICAL EQUILIBRIUM
Group: _____________ Section: ______4________ Date: _____ _ _ _____
Group members: _______________________________
_______________________________
_______________________________
_______________________________
Instructor’s/TA’s signature and comments: Expt. 1 Expt. 4 Expt. 2 Expt. 5 Expt. 3 Approval
International University, Vietnam National University - HCMC 12
GENERAL CHEMISTRY LABORATORY
1. ACID/BASE EQUILIBRIA
Equilibrium System: 2CrO 224
(aq) + 2H+(aq) ⇌ Cr2O7 (aq ) + H2O(l) Description of Predicted outcome Observation conditions Initial solution + Conc. HC l + 6 N NaOH
2. EQUILIBRIA OF ACID/BASE INDICATORS
Equilibrium System: H(MV) ⇌ (aq) + H2O(l) H3O+(aq ) + MV(aq) Addition Predicted outcome Observation None (control) 6 M HCl 6 M NaOH 6 M HCl
International University, Vietnam National University - HCMC 13
GENERAL CHEMISTRY LABORATORY
3. COMPLEX ION FORMATION
Equilibrium System: Fe3+ ⇌ 2+ (aq) + SCN (aq) [Fe(SCN)] (aq) Addition Predicted outcome Observation None (control) 0.01M FeCl3 0.01 M KSCN 6M NaOH Cold Hot 0.1M AgNO3
International University, Vietnam National University - HCMC 14
GENERAL CHEMISTRY LABORATORY
4. EQUILIBRIA OF PRECIPITATION REACTIONS
Equilibrium System: Ca2+ 2(aq) + C2O4
(aq) ⇌ CaC2O4(s) Addition Predicted outcome Observation Test tube 1: 0.1 M Na2C2O4 Test tube 2: + 0.1 M H2C2O4 Test tube 2: + 6 M HCl Test tube 2: + 6 M NH4OH
5. TEMPERATURE EFFECTS ON EQUILIBRIA
Equilibrium System: Co(H2O)62+(aq) + 4Cl(aq) ⇌ CoCl42(aq) + 6H2O(l) Description of Predicted outcome Observation conditions Nothing changed (control) Hot water bath Ice-water bath

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