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EDTA was used for the aqueous solution titration to determine the amount of calcium ions in the sample. Calculate the fraction of EDTA that exists as Y^4- at pH 10, and from this calculate pCa in 100 mL of solution of 0.100 M Ca^2+ at pH 10 after adding 100 mL of 0.100 M EDTA.
In 1978, scientists extracted a compound with antitumor and antivirus properties from marine animals in the Caribbean Sea. A sample of the compound didemnin-A
For the endothermic equilibrium CaCO3(s) + NH4+(aq) + SO42+(aq) -> CaSO4(s) + NH3(g) + HCO3-(aq), explain the best set of changes to apply in order to increase product yield effectively.
The density of liquid oxygen at its boiling point is 1.14 {kg/L} , and its heat of vaporization is 213 {kJ/kg} . How much energy in joules would be absorbed by 4.0 L of liquid oxygen as it vaporized?
The unit cell for tin has tetragonal symmetry, with a and b lattice parameters of 0.583 and 0.318 nm, respectively. If its density, atomic weight, and atomic radius are 7.30 g/cm3, 118.69 g/mol, and 0.151 nm, respectively, compute the atomic packi..
Suppose that a student collects the following spectrophotometric data to determine the relative concentrations of HMR and MR in solution:
The heat of vaporization of water =40.66 kJ/mol at 100 °C. Compute the quantity of heat that is absorbed/released when 9.00 grams of steam condenses to liquid water at the temperature of100 degree celsius.
Write the equation for the formation of ethyl acetate, What is the purpose of sulfuric acid? What happens if water is removed from the reaction mixture.
A solid object is made of two materials, one material having density of 2.4 g /cm3 and the other having density of 8.6 g/cm3. If the object contains un-equal masses of the materials (75/25), what is its average density
Calculate the pH of a solution made from 10.0mL of 0.10M HCL, 20.0mL of 0.050M NaOH, and 30.0 mL of 0.20 M NaCl. Ka for HAc (if needed)=1.8x10^-5
1 calorie = heat required to raise temp. Of 1.00 g of H2O by 1.0 oC. Which has the larger heat capacity? How much energy is transferred due to T difference?
How much heat in kilocalories is required to melt 1.70 mol of isopropyl alcohol ? The heat of fusion and her of vaporization of isopropyl
Find the standard enthalpy of formation of ethylene, C2H4(g), given: heat of combustion = -1411 kJ/mol, Hf [CO2]= -393.5kJ/mol, Hf [H2O]= -285.5kJ/mol
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