Inorganic Chemistry Answers

Calculate the weight of a sample of impure oxalic acid that should be taken for titration by 0.5000 N NaOH so that the percentage of H2C2O4.2H2O will be twice the buret reading? 

Crystal field splitting energy of [Cr(NH3)6]2+ is 10,200 cm-1, while for [Cr(NH3)4]2+ is 5900 cm-1.

Analyse the symmetry elements possessed by carbonate and hydronium ions. List the symmetry elements that both ions have in common. 

How to distinguish between cis and trans isomer of 1,2- dichloroethylene using plane of symmetry?

Calculate the oxidation of Cr in Cr₂O₇^2-

If plum pudding model of atom would be valid, then producing cathode ray and electricity would be a myth”

If plum pudding model of atom would be valid, then producing cathode ray and electricity would be a myth”

Five standard chromium(VI) solutions were prepared through serial dilution technique with corresponding absorbance readings at 540 nm wavelength as follows:

Concentration Absorbance

A₁=0.650            C₁=1.9  ppm

A₂=0.712            C₂=4.0  ppm

A₃=1.370            C₃=6.0  ppm

A₄=2.050            C₄=8.0  ppm

A₅=3.423            C₅=10.0 ppm

The sample solution gives an average absorbance reading of 0.713. What is then the concentration of chromium (VI) ion in the sample?

Water sample A has a turbidity reading of 555 NTU. If a 50 ppm standard has a turbidity reading of 50 NTU, what is the concentration of the analyte in A that causes the water to be turbid?

A water sample has been analyzed for phosphate using UVVS method at 662 nm wavelength. The molar absorptivity of the standard phosphate gives a value of 1.03 x 10³ L/mol.cm and an average absorbance reading of 0.431 for the water sample. Is the water from where the sample is taken safe for human drinking?