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When blood is donated, sodium oxalate solution is used to precipitate Ca2+, which triggers clotting. A 104 mL sample of blood contains 9.7 x 10^-5 g Ca2+/mL. A technologist treats the sample with 100 ml of .1550 M Na2C2O4. Calculate [Ca2+] after the treatment. (Ksp=2.30 x 10^-9)
Determine the equilibrium concentrations of the following: a. The cobalt ion concentration of a saturated solution of Cos b. The pH of a saturated Zn(OH)2 solution c. The lead (II) ion concentration of a saturated solution of PbCL2
question 1 a the density of mercury is 13.595 g cm-3 . what will be this value in si units?b give the si units and
Disscuss by IR spectrum and NMR. On my spectrum, it showed up 3282.57, 16557.91 and 16003.22. What are those wavelength are stand for
Fatty acids are soluble in solvants such as petroleum ether, but the salts of fatty acids are not. Explain this observation. What is another name for a salt of a fatty acid
What is the value of deltaH0 (in kJ) for the reaction described below. Assume the reaction is performed at 250C. C2H2 (g) + 2H2 (g) -----> C2H6 (g) a. - 248 b. - 311 c. - 173 d. 236
A student is asked to determine the formula of a hydrate of colbalt (II) chloride. The mass of the empty clean, dry crucible and cover, after heating is 22.446 g. A sample of 0.324 g of cobalt chloride is added to the crucible.
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 7.00 nm in diameter? Take the mass..
A single crystal of a metal is oriented for a tensile test such that its slip plane normal makes an angle of 65.5° with the tensile axis. Three possible slip directions make angles of 30°, 48°, and 78° with the same tensile axis.
a certain element has only two naturally occurring isotopes one with 18 neutrons and the other with 20 neutrons. the element forms 1 charged ions when in ionic compounds. predict the identity of the element. what number of electron does the 1 char..
A chemist is commissioned to produce 50,000 liters of .550M aqueous phosphoric acid. The chemist can purchase solid, 98.64% pure, phosphoric acid to dissolve in water. How many grams of this reagent are required
Calculate the fractional compositions 0 (HA) and 1 (A) for HEPES at pH = 7.00, 7.56, and 7.80. Assume the ionic strength is zero.
a solution of malonic acid h2c3h2o4 was standardized by titration w.1000m naoh solution. if 20.76 ml of the naoh
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