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Question- You have a buffer solution composed of 4.50 mol of acid and 4.75 mol of the conjugate base. If the pKa of the acid is 4.40, what is the pH of the buffer?
I need help for above question. Show each steps for the above problem.
If the water in a well has 1000.0 mg/L of CaCO3 dissolved in it, How many grams of Na2C2O4 could you mix with 100.0 mL of that water before a precipitate would form
A and B mix to form an ideal solution.what is the Gibbs energy of A in the solution as compare to the Gibbs energy
A 25 ml sample of .10M sodium acetate is titrated with .10M HCl. What is the pH after the addition of 35ml of HCl. (Kb of CH3CO2=5.6e-10)
If aluminum, with an atomic weight of 27, combines with oxygen, with an atomic weight of 16, to form aluminun oxide, how much aluminum would be required to react completly with 84g if oxygen
A compound consist of 40.00% carbon, 6.71% hydrogen and 53.29% oxygen and has a molecular mass of 180+- 1g/mole. Determine the empirical and molecular formulas of the compound.
Complete and balance the following half-reactions. In each case indicate whether the half-reaction is an oxidation or reduction. Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.
for the reaction given below the frequency factor a is 8.7 1012 s-1 and the activation energy is 63 kjmol.nog o3g no2g
A 25.0 mL bubble is released from a diver's air tank at a pressure of 4.00 atm and a temp of 11.0 degrees C. Show how to determine the volume of the bubble when it reaches the surface where the pressure is 0.998 atm and the temp is 18.0 degrees C.
The volume of oxygen used was 747.0 milliliters at 1,092 K and12.00 atm pressure, Calculate the percentage by weight of graphitein the original mixture.
100 ml sample of hard water is titrated with the ETDA solution in problem 2. the volume of EDTA required to reach the end point is 22.44 ml
how much sodium hydroxide must be added to a sample of seawater to completely precipitate 89.2 mg of magnesium ions present?
Solution A has a hydronium ion concentration of 3.8 X 10-8 M. Solution B has a hydronium ion concentration of 2.5 X 10-4 M. which solution has the larger hydronium ion concentration. and which solution has the larger pH.
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