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Problem- In a solution of 108.5 mM acetate buffer (again, this is the concentration of all ionization states of the acetate/acetic acid combined), what is the pH of the solution if the concentration of acetate is 94.9 mM (just the deprotonated state)? The pKa of acetic acid is 4.76. Report your answer to two decimal places.
Rework your solution from the beginning and check each step carefully.
Problem- What is the hydronium-ion concentration of a solution formed by combining 700. mL of 0.18 M HCl with 300. mL of 0.51 M NaOH at 25ºC
The pKa of asprin acetyl salicylic acid is about 3 while the pH of stomach acid is about 1. Circle the approximate proportion of ionized deprotonated and charged for acid) to unionized protonated and uncharged for acid aspirin which would occur in..
Compute the number of moles of solute contained in the subsequent volumes of aqueous solutions of the following pesticides
A drug is metabolized in the body by a first order rate process. If the half life for this drug in the body is two days. If 100 mg is taken define how much remains after 5 hours
Why pure oxygen is often administered to victims of CO poisoning explain using le chatelier's principle? Hb (CO) aq + O2 aq is HbO2 aq + CO aq
A liquid has a delta H degree vap of 35.5 kj/mol as well as a boiling point of 122 degrees Celsius at 1.00 atm. Explain what is its vapor pressure at 113 degrees celcius
When 0.800 g of Ca metal is added to 200-mL of 0.500 M HCl (aq), a temperature increase of 13.0 degrees Celsius is observed. What is the qreaction for the reaction of Ca(s) + 2H+(aq)?
a liter of solution contains 0.140 M Ca+2 and 0.140 M Pb+2. They are to be seperated using chromate (CrO4-2) to selectively precipitate out one metal.
The activity of a radioactive sample is the number of nuclear disintegrations per second, which is equal to the first-order rate constant times the number of radio-active nuclei present.
Problem- A 10.0 mL sample of 0.075 M hydrochloric acid is titrated with 0.200 M NaOH. Calculate the pH after: a) 2.00 mL of base has been added b) 5.00 mL of base has been added c) 7.00 mL of base has been added.
If the heat of fusion os X is 80.0 J/g, the heat of vaporization is 190.J/g, and if 3.5 J are required to warm 1 g of X each degree, how much energy will be needed to accomplish the change in a
a sample of gas mixture from a neon sign contains 0.0856 mol ne and 0.0254 mol kr. what are the mass percentages of ne and kr in the gas mixture?
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