Observation Report Estimating the duration Redox Reaction

I. Destination
Knowing the relationship influence the color change before and after reaction with use traditional course of the reaction with evidence of the potential price of the cell.

II. Materials and tools
• 5 pieces of test tubes
• 1 piece of test tube rack
• Table cell potential price
• 1 piece of metal Mg, Zn and Pb
• 2 pieces of metal Cu
• A solution of HCl
• CuSO4 solution
• solution of ZnSO4
• A solution of Pb (NO3) 2


III. How it Works
1. Prepare 5 pieces of test tubes.
2. Wash clean test tube.
3. Putting all five pieces to the shelf test tube reaction tabunng
4. Incorporating approximately 5ml (or to taste, can be seen from the reaction):
• HCl solution into the first tube
• CuSO4 solution into the second and third tube
• ZnSO4 solution into the fourth tube
• A solution of Pb (NO3) 2 into the fifth tube
5. Setting up the pieces of Mg, Zn, Pb and Cu, then enter:
• Mg metal into the first tube. Observe and record what has happened.
• Zn metal into the second tube. Observe and record the color change logan and solution before and after the reaction.
• Pb metal into the third tube. Observe and record the color change logan and solution before and after the reaction.
• Cu metal tube into the fourth. Observe and record the color change logan and solution before and after the reaction.
• Cu metal tube into the fifth. Observe and record the color change logan and solution before and after the reaction.
See the following picture:

Mg Cu Zn Pb Cu



HCl CuSO4 CuSO4 ZnSO4 Pb (NO3) 2

IV. Observation
1. Reaction of Mg metal with HCl
Color before Color after
Mg Gray black White long gone
HCl Bening Stay clear clear clear

2. Reaction of metal pendesakan
Tube to a metallic-color Observations Observations color of the solution
before after before after
2 carat Color Gray, long devastated Blue Light blue nodes for long clear
3 Silver Somewhat clear black Blue Light blue long clear
4 Yellow gold Yellow gold Bening Bening lucid lucid
5 Yellow gold Yellow gold Bening Bening lucid lucid

V. Conclusion
The color change before and after the reaction takes place to determine whether or not a reaction.
• If the color of the reaction solution before and after the change, meaning the reaction can take place.
• If the color of the solution before and after the reaction remains, meaning the reaction can not take place.
This can be evidenced by the price table cell potential, namely:
• If the price of a reaction after the cell potential is calculated, the price is positive means that the reaction can take place.
• If the price of a reaction after the cell potential is calculated, hargany negative reaction means that it can not take place.

VI. Answer Questions
1. Among the five trials that I observe,
• The reaction can take place is the group 1, 2, 3.
Ø HCl (aq) + Mg (s) + H (s) + MgCl (aq)
Ø CuSO4 (aq) + Zn (S) Cu 2 + (s) + ZnSO4 (aq)
Ø CuSO4 (aq) + Pb (s) Cu2 + (s) + PbSO4 (aq)
• The reaction can not take place is the group 4 and 5.
Ø ZnSO4 (aq) + Cu 2 + (s)
Ø Pb (NO3) 2 + Cu 2 + (s)
2. a. Potential price of each cell:
• HCl (aq) + Mg (s)
H + Eo = Eo - Eo Mg2 +
= 0.00 - (-2.375) = +2.375

• CuSO4 (aq) + Zn (S)
Cu2 + Eo = Eo - Eo Zn2 +
= +0.34 - (-0.763) = +1.103

• CuSO4 (aq) + Pb (s)
Cu2 + Eo = Eo - Eo Pb2 +
= +0.34 - (-0.126) = + 0.466

• ZnSO4 (aq) + Cu (s)
Zn2 + Eo = Eo - Eo Cu2 +
= -0.763 - (+0.34) = -1.103

• Pb (NO3) 2 + Cu (s)
Pb2 + Eo = Eo - Eo Cu2 +
= -0.126 - (+0.34) = -0.466
b. There is a relationship between cell potential price of the course of a redox reaction.
• If the potential price of cells positive (> 0), meaning the reaction can take place.
• If the potential price of cells positive (> 0), meaning the reaction can take place.

Fixed Preposition

Number	Fixed Preposition	Meaning
1.	Abhor to	Bertentengan dengan
2.	According to	Sesuai dengan
3.	As contrasted with	Bertentangan dengan
4.	As distinct from	Bertentangan dengan
5.	As opposed to	Bertentangan dengan
6.	Because of	Karena
7.	In accord with	Sesuai dengan
8.	In behalf of	Atas nama
9.	In connection with	Menghafal di luar kepala
10.	In consequence of	Sebagai akibat dari
11.	In contrast with	Demi kepentingan
12.	In contradiction to	Bertentangan dengan
13.	In order to	Agar supaya
14.	In spite of	Berhubungan dengan
15.	In ( with ) regard to	Berkenaan dengan
16.	On behalf of	Karena
17.	Owing to	Sesuai dengan
18.	Referring to	Meskipun
19.	Similar to	Mirip dengan
20.	Subsequent to	Lebih kemudian daripada
21.	As opposed to	Bertentangan dengan
22.	To look after	bersandar kepada
23.	To look at	Melihat kepada
24.	To look for	Mencari
25.	To look into	memeriksa
26.	To look up ( dictionary )	Mencari di ( kamus )
27.	To look forward to	Menanti akan
28.	To look around	Melihat – lihat
29.	To look about	Melihat keliling
30.	To become acquainted to	Berkenalan dengan
31.	To be acquainted with	Kenal akan
32.	To be afraid of	Takut kepada
33.	To be angry with ( someone )	Marah kepada
34.	To be angry about ( something )	Marah tentang
35.	To be amused at	Senang dengan
36.	To be annoyed with ( someone )	Jengkel kepada
37.	To be bore of	Bosan dengan
38.	To be content with	Puas dengan
39.	To be dependent of or to depend on	Tergantung dengan
40.	To be disappointed in ( someone )	Kecewa dengan
41.	To be disappointed with	Kecewa tentang
42.	To be good at ( lesson )	Pandai dalam
43.	To be fond of	Gemar pada
44.	To be ill of	Sakit karena
45.	Put on	Memakai
46.	Put in	Menghabiskan
47.	Put out	Memadamkan
48.	Put off	Menunda
49.	Take off	Membatalkan
50.	Wear off	Melepaskan