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​​​​​​ [ I only need the answer for question number
3 ]
Weighed mass of K2Cr2O7:
W1=0.4416 g
W2=0.0031g
W1-W2= ……………………………………g
Wavelength(X)
Absorbance(Y)
420 nm
0.208
460 nm
0.164
510 nm
0.120
540 nm
0.075
600 nm
0.01
b. The maximum Absorbance is ………………...so
λmaxis ……………………………..
Volume of std (mL) (V1)
Concentration(X)
Absorbance reading(Y)
1.0
0.090
2.0
0.180
3.0
0.218
4.0
0.295
5.0
0.360
6.0
0.443
7.0
0.462
8.0
0.525
Unknown…….
Y=0.280