chemistry report
Abstract
The separation of a Fe3+ and Ni2+ mixture was firstly investigated; followed by the determination of the Fe3+ and Ni2+ content (concentration) in the original mixture. It was found that iron was a yellow solution and nickel respectively had a greenish colour. Their original concentrations respectively were 0.03669 M for iron and 0.03159 M for nickel.
Introduction
Ion exchange materials are insoluble substances containing loosely held ions which are to be exchanged with other ions in solutions which come in contact with them. These exchanges take place without any physical alterations to be the ion exchange material. Ion exchangers are insoluble acids or bases which have salts which are insoluble, and this enables them to exchange either positively charged ions (cations exchanges) r negatively charged one (anion exchangers). Many natural substances such as proteins, cellulose, living cells and soil particles exhibit ion exchange properties which play an important role in the way they function in nature.
Synthetic ion exchange material based on coal and phenolic resin were first introduced for industrial use during the 1930s.
Results and Calculations
The concentration of Ni2+ and Fe3+ ions was to be calculated.
In order to calculate the concentration of Ni2+ in the original test solution, we needed to do the double titration method. We do this in order to titrate the nickel from the test solution with EDTA then take the ratio of the volume EDTA to the volume Nickel.
The recorded volumes were,
Table 1:
EDTA (mL)
Nickel (mL)
Ratio
22.00
32.1
0.685
28.0
41.6
0.673
33.7
42.3
0.797
35.7
43.9
0.813
36.9
46.4
0.795
The calculation for the determination of Ni2+:
The mole ratio of EDTA:Nickel is equal so,
This calculation was done with the first titration so if I take the average of the three best titrations with a difference of 3 out of 1000.
Average EDTA =
Average Nickel =
[Ni] =
The separation of a Fe3+ and Ni2+ mixture was firstly investigated; followed by the determination of the Fe3+ and Ni2+ content (concentration) in the original mixture. It was found that iron was a yellow solution and nickel respectively had a greenish colour. Their original concentrations respectively were 0.03669 M for iron and 0.03159 M for nickel.
Introduction
Ion exchange materials are insoluble substances containing loosely held ions which are to be exchanged with other ions in solutions which come in contact with them. These exchanges take place without any physical alterations to be the ion exchange material. Ion exchangers are insoluble acids or bases which have salts which are insoluble, and this enables them to exchange either positively charged ions (cations exchanges) r negatively charged one (anion exchangers). Many natural substances such as proteins, cellulose, living cells and soil particles exhibit ion exchange properties which play an important role in the way they function in nature.
Synthetic ion exchange material based on coal and phenolic resin were first introduced for industrial use during the 1930s.
Results and Calculations
The concentration of Ni2+ and Fe3+ ions was to be calculated.
In order to calculate the concentration of Ni2+ in the original test solution, we needed to do the double titration method. We do this in order to titrate the nickel from the test solution with EDTA then take the ratio of the volume EDTA to the volume Nickel.
The recorded volumes were,
Table 1:
EDTA (mL)
Nickel (mL)
Ratio
22.00
32.1
0.685
28.0
41.6
0.673
33.7
42.3
0.797
35.7
43.9
0.813
36.9
46.4
0.795
The calculation for the determination of Ni2+:
The mole ratio of EDTA:Nickel is equal so,
This calculation was done with the first titration so if I take the average of the three best titrations with a difference of 3 out of 1000.
Average EDTA =
Average Nickel =
[Ni] =
References: 1. Ion exchange resin. [Online]. Available: www.britannica.com/EBchecked/ topic/292829/ion-exchange-resin 2. Structure of EDTA. [Online]. Available. en.wikipedia.org/wiki/File:EDTA.svg 3. Structure of Murexide. [Online]. Available. en.wikipedia.org/wiki/File:Murexide.png