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Writing a lab report on Complexion of Metal Ions with EDTA. We initially prepared an EDTA solution with target concentration of 0.05 M, and titrated that solution by NaOH (known concentration). The second "pathway" used to determine exact concentration of EDTA was by adding a MgSO4 7H2O to the EDTA solution and titrating it by the same NaOH. I am trying to figure out what makes the titration curve shift when the metal is added, and basically I am trying to explain/understand why this pathway can be used in order to determine the concentration of the EDTA solution.
By mass spectral analysis, a sample of strontium is known to contain 2.64x1010 atoms of Sr-90 as the only radioactive element. The absolute disintegration rate of this sample is measured as 1238 disintegrations per minute. Calculate the half-life ..
A mixture is prepared by adding 22.7 mL of 0.157 M Na3PO4 to 31.2 mL of 0.277 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of each of the ions in the mixture after reaction?
how much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol
Would the organisms find the environment in the untreated water more favourable, less favourable, or identical (from an energy standpoint) after equilibration with air. Explain briefly
A solution containing potassium bromide is mixed with one containing lead acetate to form a solution that is 0.013M in KBr and 0.0035 M in Pb (C2H3O2)2.
if 280 nm wavelenght light were used instead of (still 30mJ) how would the experimental result change consifer both the numbers and the energy of the electrons
When 2.70 g of this compound is added to 250.0 mL of water, the temperature rises from 23.2°C to 28.8°C. Calculate the heat of reaction (qrxn = ?Hrxn) per gram of compound (in kJ/g).
A pure titanium cube has an edge length of 2.71in How many titanium atoms does it contain? Titanium has a density of 4.50 g/cm^3
a 145 g aluminum cylinder is removed from a liquid nitrogen bath where it has been cooled to -196deg c. the cylinder is
an ideal diesel engine has a compression ration of 20 and uses air as the fluid. the state of air beginning the
Explain why the major product of bromination of vanillin was 5 bromovanillin and not 2 bromovanillin or 6 bromovanillin.
a solution of ammonia and water contains 3.10times1025 water molecules and 5.60times1024 ammonia molecules. how many
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