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Formic acid, HFor, has a Ka value equal to about 1.8 * 10^(-4). A student is asked to prepare a buffer having a pH of 3.60 from a 0.10 M HFor and a 0.10M NaFor solution. How many milliliters of the NaFor solution should she add to 20 ml of the 0.10 M HFor to make the buffer?
Draw the skeletal structure of the major organic product formed when benzaldehyde reacts with Cl2 in the presence of AlCl3. Assign atomic charges where appropriate.
A solution of sodium chloride in water has a vapor pressure of 20.3 torr at 25°C. What is the mole fraction of NaCl in this solution?
Assume each of the following: the fuel has an average formula of C7H16; 15% of the heat generated from combustion goes to heat the water (the rest is lost to the surroundings); the density of the fuel is 0.78 g/mL; the initial temperature of the w..
Write the net ionic equation (including phrases) that corresponds to Cu(ClO4)2 (aq) + K2CO3(aq) --> CuCO3(s) + 2KCLO4(aq).
What volume will 5.6 moles of Sulfur hexafluoride (SF6) gas occupy if the temperature and pressure of the gas are 128 deg C, and 9.4 atm
What are the concentrations of barium and sulfate ions in this solution? Assume only SO42- ions (no HSO4? ) are present
calcualte the pH at one-half the equivalence pont and at the equivalence point for a titration of 50 mL of 0.100M acetic acid with 0.100M NaOH
A student used 22.0 mL of 0.1035 M NaOH to titrate 20 mL of orange juice. How many grams of citric acid were present in the sample? The molar mass of citric acid, H3C6H5O7, is 192.12 g/mol. H3C6H5O7(aq) + 3NaOH(aq) Na3C6H5O7(aq) + 3H2O(l)
Check your gas chromatogrm for the presence of compounds other than isopentyl acetate. Explain the presence of any additional
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.80 g of sodium carbonate is mixed with one containing 5.43 of silver nitrate.
When a piece of copper wire is placed in a colorless solution of silver nitrate, the surface of the wire becomes coated with a shiny silvery material, and the copper begins to form aqueous copper(II) nitrate, which is blue. Which of the following ..
The pressure of an unknown gas is measured with a manometer. Instead of mercury the manometer is filled with a liquid (X) whose density is 0.673 g/cc. The pressure is measured as 591 mmX. What is the pressure in mmHg
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