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What is the pH of a buffer that results when .50 mole of H3PO4 is mixed with .25 mole of NaOH and diluted with water to 1.00 L (The acid disassociation constants of phosphoric acid are Ka1=7.5 *10^-3, Ka2=6.2*10^-8 and Ka3=3.6*10^-13. you use the first Ka but why?
A chemical reaction at equilibrium is heated, briefly, by holding it over a flame. The equilibrium is seen to shift toward the products. What can be said about the enthalpy and entropy of the reaction
What is the percent yield of a reaction in which 212 g phosphorus trichloride reacts with excess water to form 109 g HCl and aqueous phosphorus acid (H3PO3)?
A particle rotates on the surface of a sphere. The angular momentum of the particle can be considered as a vector starting at the center of the sphere and pointing outward.
Titration of an oxalate sample gave the following percentages of percent oxalate: 12.28%, 12.54%, and 12.24%. Calculate the average and the standard deviation.
The cell potential of the following electrochemical cell depends on the ph of the solution in the anode half-cell:
Combining aqueous solutions of BaI2 and Na2SO4 gives a precipitate. Which ion(s) is/are spectator ions in the reaction
What is the pE value in an acid mine water sample having [Fe3+] = 6.79E-3 M and [Fe2+] = 4.14E-4 M?
A solution is prepared by dissolving 17.75 g Sulfuric acid (H2S04;MW = 98.0g/mol) in 93.2 g of water. If the density of the solution is 1.1094g/mL, what is the molarity of the sulfuric acid?
Determine the barometric pressure of water If a mercury (Hg)barometer reads 755 mmHg,?Express your answer in cm?
Consider the combustion reaction between 30.0mL of liquid methanol ( density = 0.850 g/mL) and 15.0L of oxygen gas measured at STP. The products of the reaction are CO2 and H2O
Show that the van der Waals and Redlich-Kwong equations of state reduce to the ideal gas equation of state in the limit
Some N205 is added to a container exerting 1.00 atm before any reaction. When the equilibrium is reached, the total pressure in the container is 2.20 atm. Calculate Kp for this reaction.
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