kimhoss2

24.04.2020 • 

Chemistry

Operating Wavelength: 445 nm
Preparation of Standard Calibration Curve of [FeSCN]2+

Sample Number Absorbance Final Concentration of [FeSCN]2+ (M)
A 0.145 4.0E-5
B 0.255 8.0E-5
C 0.410 1.2E-4
D 0.640 1.6E-4
E 0.810 2.0E-4

Determination of [FeSCN]2+ in Equilibrium Mixtures

Sample Number Absorbance
1 0.290
2 0.310
3 0.410
4 0.510

For Sample #1:
Enter the initial concentration of Fe3+. (M)
Calculate the equilibrium concentration of Fe3+. (M)
Enter the initial concentration of HSCN. (M)
Calculate the equilibrium concentration of HSCN. (M)
Calculate Keq for sample 1.
For Sample #2:
Enter the initial concentration of Fe3+. (M)
Calculate the equilibrium concentration of Fe3+. (M)
Enter the initial concentration of HSCN. (M)
Calculate the equilibrium concentration of HSCN. (M)
Calculate Keq for sample 2.
For Sample #3:
Enter the initial concentration of Fe3+. (M)
Calculate the equilibrium concentration of Fe3+. (M)
Enter the initial concentration of HSCN. (M)
Calculate the equilibrium concentration of HSCN. (M)
Calculate Keq for sample 3.
For Sample #4:
Enter the initial concentration of Fe3+. (M)
Calculate the equilibrium concentration of Fe3+. (M)
Enter the initial concentration of HSCN. (M)
Calculate the equilibrium concentration of HSCN. (M)
Calculate Keq for sample 4.
Calculate average Keq using the Keq using the 4 samples.

Ответ:

aubrey13m

11.11.2022

Chemistry

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ions are nothing more than charged atoms. basically when an atom gains or loses electrons, it becomes, charged( positive when it loses electrons and negative  when it gains electrons. )

Ions and atoms both have protons, electrons,  and neutrons ( except normal hydrogen ions and hydrogen atom.)The difference is that atoms are electrically neutral meaning that have no charge in it while ions do have a charge

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