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The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.220 moles of a monoprotic weak acid (Ka = 1.8 Ã- 10-5) is titrated with NaOH, what is the pH of the solution at the half-equivalence point?
if 0.220 mole of the weak acid Ka is 1.8 *10^-5 is titrated with NAOH what is the PH of the solution at the half way equivalence point
The rate of bacterial hydrolysis of fish muscle is twice as great at 2.2 degrees C as at -1.1 degrees C. Determine the activation energy for this reaction.
A 100 mm diameter silicon wafer is oxidized completely. What is the thickness of the resulting SiO2 wafer? The molecular weight of Si is 28 g/mol and of SiO2 is 60 g/mol.
A student mixed 75.0 mL of water containing 0.75 mol HCl at 25 degrees C with 75.0 mL of water containing 0.75mo of NaOH at 25 degrees in a foam up calorimeter. The temperature of the resulting solution increased to 35 degrees C.
Compute the partial pressure of N2 at the surface of theH 2 O in mmHg. The Henry's law constant for nitrogen gas =1.3x 10^-3 mol/L x atm? at 25 degrees Celsius
A solution is prepared by dissolving 13.4 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 12.00 mL sample of this stock solution is added to 57.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
What is the wavelength of light whose energy is 1000.4 J?
What is the molarity of a solution of 14.0 g NH4Br in enough H2O to make 150 mL of solution?
A star is estimated to have a mass of 1x10^36 kg. Assuming it to be a sphere of average radius 7.5x10^5 km, calculate the average density of the star in units of grams per cubic centimeter.
detailed procedure of determining the enthalpy of reaction between citric acid (H3Cit) and sodium hydroxide (NaOH). Calculate what volume of each .50M solution should be mixed to give a total volume of 50.0mL and the reactants in the correct stoic..
The water level in a graduated cylinder initially at 217 rises to 286 after a piece of lead is submerged. What is the mass in grams of the lead?
the pressure of a sample of a 1000 mL sample of gas at 10.0C increases from 700 mm Hg to 900 mm Hg. If the volume is unchanged, what is the new temperature
The mass ratio of sodium to fluorine in sodium floride is 1.21:1. a sample of sodium fluoride produced 26.5g of sodium upon decomposition how many grams of fluorine was formed.
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