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What is the pH of a solution that results from diluting 0.30 mol acetic acid (CH3CO2H) and 0.20 mol sodium acetate (NaCH3CO2) with water to a volume of 1.0 L? (Ka of CH3CO2H = 1.8 x 10^-5? I know to find the molarity of each, considering the 1 L volume. I know to use the Henderson-Hasselbalch equation. My question is, how do I know which compound to put as the numerator in the equation: pH = pKa + log [NaCH3CO2]/[CH3CO2H]...I know this is the correct way to do it, but I need to know WHY sodium acetate is the numerator and not acetic acid
Zinc chloride (ZnCl2) is 52.02% chlorine by mass. What mass of chlorine is contained in 66.0 g of ZnCl2?
Proceeds at a certain temperature until the partial pressures of H2O, H2, and O2 reach 0.0800 atm, 0.00500 atm, and 0.00200 atm respectively.
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 77% of the Mg2 be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9 10-12.]
A sample of calcium nitrate, Ca(NO3)2, with a formula weight of 164 g/mol, has 5.00 x 1025 atoms of oxygen. How many kilograms of Ca(NO3)2 are present
where all compounds are assumed as covalent then determine which reaction must be endothermic and also explain your answer briefly?
How much energy is released from the complete combustion of 63.0 g of sulfur in this equation:
if it takes 6.02 kJ of heat energy to melt a mole of ice, how much heat is absorbed when 6.30 g of water melts?
Gas ammonia can be decomposed to give 3.00 by mass of hydrogen and 14.0 by mass of nitrogen.what mass of nitrogen is obtained.
What is the density of lead (in g/cm^3) if a rectangular bar measuring 0.500 cm in height, 1.55 cm in width, and 25.00 cm in length has a mass of 220.9 g?
Suppose a 5.00 L sample of O2 at a given temperature and pressure contains 2.73 × 1023 molecules. How many molecules would be contained in 5.00 L H2 at the same temperature and pressure.
What is the structure for the indole that would be obtained from the phenylhydrazone
5.00 ml of a water sample was titrated for hardness with 4.15mL of 0.0200M EDTA. Write an equation for the reaction and calculate the hardness of the water in ppm
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