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pH = pKa + log ( [A-] / [ HA ] 100 ml of buffer is made using 0.041 moles of HC2H3O2 (acetic acid) and 0.038 moles of NaC2H3O2 (sodium acetate). The Ka of acetic acid is 1.8 x 10-5 Using the above equation, what is the pH of this solution? What are spectator ions and what effect do they have on the pH of water
A bottle contains 225mL of insulin at a concentration of 40.0mg/mL . What is the total mass of insulin in the bottle?
Classify the substances according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution
Combustion reactions are exothermic. The heat of reaction for the combustion of cyclohexane, C6H12, is 936.8 kcal/mol. What is the heat of combustion for cyclohexane in kcal/gram
Compute the mass of air in an air-filled tire and the also determine the mass of He in a helium-filled tire
The lab is synthesis of Methyl Benzoate. The question is besides fischer sterification Name three other ways to make esters.
The wavelength corresponding to threshold frequency to tungsten surface is 230nm . Calculate the kinetic energy of the photoelectron ejected from the surface of tungsten metal.
Calculate the amount of heat liberated (in kJ) from 325 g of mercury when it cools from 81.9°C to 10.0°C.
Enough of a monoprotic acid is dissolved in water to produce a 0.0198 M solution. The pH of the resulting solution is 6.37. Calculate the Ka for the acid.
Suppose you have a stoppered ?ask containing CO2 gas at room temperature and pressure. If the volume of your stoppered ?ask is 300.0 mL, the pressure in the room is 770 mm Hg, and the temperature in your work area is 22.0°C, how many moles of CO2 ..
what mass of calcium carbonate is required to react with 137.8 mL of a 0.6943 M sulfuric acid solution?
Fluorine has an average atomic mass of 18.998403 u, and chlorine has an average atomic mass of 35.453 u. How many grams of chlorine contain the same number of atoms as 1.00 g of fluorine
the compound sucrose is commonly known as table sugar. the chemical formula of sucrose is C12H22O11. How many hydrogen atoms are resent in 1.50 x 10^-4 mol of sucrose
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