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A 50.00 mL aliquot of a hard water sample is titrated with 15.00 mL of 0.0100 M EDTA, using Arsenazo indicator. A second 50.00 mL aliquot is made strongly alkaline with sodium hydroxide. A precipitate results. Calcein indicator is added to the solution. The sample then requires 10.00 mL of 0.0120 M EDTA for titration. Calculate for this sample (a) the molarity of the calcium present, (b), the molarity of the magnesium present, and (c) the total hardness of the water (as ppm of CaCO3 and MgCO3).
25 g of gold is initially 27 degrees celsius. what's the final temperature when absorbing 2.35 kJ of heat?
Draw appropriate Lewis structure and VSEPR structure for oxalate anion. What is the O-C-O bond angle? What is the C-C-O bond angle? What is the hybridization of each carbon? On which atoms does the negative charge reside? Draw all resonance struct..
the starting concentration of reactants (Q) and products (R) are both 15 uM, then the equilibrium concentration of Q and R is what in uM?
Balanced Equation for Sulfathiazole Synthesis - Regarding the synthesis of sulfathiazole from 2-aminothiazole and p-acetamidobenzenesulfonyl chloride,
Write the structures of the organic products that will be formed when methyl benzoate is treated with lithium aluminum hydride and the reaction mixture is worked up with aqueous acid.
The electron microscope has been widely used to obtain highly magnified images of biological and other types of materials. When an electron is accelerated through a particular potential field,
In a reaction that is first-order with respect to reactant A and second-order with respect to reactant B, what will happen to the rate of the reaction if we
Comment on the following observation: in its complexes, Co(III) forms strong bonds to O- and N- donor ligands, moderately strong bonds to P- donor ligands
Calculate the molar mass of the biomolecule. for carbon tetrachloride, the boiling-point constant is 5.03 degrees C x kg/mol, and the boiling point of pure carbon tetrachloride is 76.50 degrees C.
Calculate the concentrations of all species in a 1.01 M Na2SO3 (sodium sulfite) solution
Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
Assume that the system benzene and chlorobenze at 100 degree celcius obeys Raoult's law. for a binary mixture with an overall mole fraction Z=.30 determine
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