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How many grams of sodium lactate (NaC3H5O3 ) should be added to 1.46 L of 0.150 M lactic acid (HC3H5 O3, Ka = 1.4 x 10-4) to form a buffer solution with pH = 4.12? Assume that no volume change occures when the solid sodium lactate is added. ans in g
What is the coordination environment of F in a hypothetical relative of CaF2, in which Ca forms a hcp array and F occupies all the tetrahedral sites?
The compound K2SiO 3 • χH2O is a hydrated crystal. It is analyzed for percent water in a procedure similar to the laboratory assignment with barium chloride
Calculate the equilibrium concentrations of boric acid (H3BO3) and the borate anion (H2BO3-) in pH 8 seawater, given a total boron concentration (H3BO3 + H2BO3-)
A stock solution is prepared by adding 10 mL of 2.5 M Ba(CN)2 to enough water to make 23 mL. What is the CN- concentration of 5 mL of the stock solution
A 0.30 M solution of sucrose (C12H22O11) at 37oC has approximately the same osmotic pressure as blood. What is the osmotic pressure of blood?
Calculate the pH at the following points a. Before Titration b. After the addition of 5.00mL of NaOH c. After the addition of 25.00mL of NaOH d. After the addition of 50.00mL of NaOH e. After the addition of 5.00mL of NaOH
How many liters of water vapor can be produced if 13.3 liters of methane gas (CH4) are combusted, if all measurements are taken at the same temperature and pressure?
A dog sits 1.07 m from the center of a merry go-round with an angular speed of 1.44 rad/s. If the magnitude of the force that maintains the dog's circular motion is 41.2 N.
The half-life of radon-222 is 3.8 days. How much of a 100 g sample is left after 15.2 days?
How many milliliters of 1.00 M KOH should be added to 100 mL of solution containing 10.0 g of histidine hydrochloride (His HCl, FM 191.62) to get a pH of 9.30?
what is the pressure when the volume of the gas is reduced to one-fifth of the original value at the same temperature?
Calculate the enthalpy change for converting 10.00g of ice at -25.0°C to water at 70.0°C in kJ. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K,.
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