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Cr3+ is used in the tanning of leather. Cr(VI), as dichromate ion ( Cr2O7^2-) is much more toxic that Cr3+. If the excess of Cr3+ is discharged into a waste stream that is saturated with atmospheric oxygen at the pH of 6.0, would there be a significant conversion of Cr3+ to dichromate at equilibrium? Present numerical results to justify your conclusion.
0.80g of hydrogen chloride is dissolved in water to make 2.5L of solution. What is the pH of the resulting hydrochloric acid solution?
How many moles of sulfate ions (SO2-/4) are present in 1.6 moles Al2(SO4)3
Outline a complete mechanistic sequencefor the reaction of 2-bromobutane with potasium2-methyl-2-propoxide in 2-methyl-2-propanol solvent to form the three alkenes generated in the reaction
The pH of a sodium acetate-acetic acid buffer is 5.30. Calculate the ratio [CH3COO-]/[CH3COOH].
The element cesium (Cs) freezes at 28.4 degree celsius, and its molar enthalpy of fusion is delta H fusion =2.09kJ/mol. a.) when molten cesium solidifies to Cs (s) at its normal melting point, is delta S positive or negative? b.)calculate the valu..
In 0.1592 M solution, a weak acid, HA, is 7.11% ionized. Calculate the ionization constant for the weak acid.
determine the amount of heat energy needed to convert 255g of substance x from 40 degrees to 300 degrees
Mass Absorbance Recrystallized sample .3040 g .070 concentration of salicyclic acid in the recrystallized aspirin sample solution =.000044 M
When 157mg of dipentylamine was added to 122mg of benzoic acid and 2 mL of water, a completey homogenous solution was formed. Draw the structures of the species present in water.
A 30.5-g sample of an alloy at 93.0°C is placed into 50.0 g of water at 22.0°C in an insulated coffee cup with a heat capacity of 9.2 J/K.
If 8.6 L of H2 reacted with 4.3L of O2 at STP, what is the volume of the gaseous water collected (assuming that none of it condenses)? 2H2(g) + O2(g) -> 2H2O(g)
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
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