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What is the pKa of nitrous acid; Ka = 4.5 × 10–5 ?
1.62
3.35
4.35
6.83
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- What is the pH of a 0.10 M solution of an acid with a pKA of 8.4?What is the pKb of the conjugate base of a weak acid that has a pKa equal to 3.52? (temperature is 25ºC)You have a solution of a weak acid. The solution contains approximately 80% HA and 20% A-at pH 8. The pKa of the weak acid HA is MOST LIKELY to be ____________. 7.07.48.08.69.0
- What is the pH of a 0.173 M solution of a hydrogen sulfide? The pKa at the temperature of the experiment is equal to 7.03.Calculate the pH of a 0.20 M HA solution, given the pKa of HA is 2.22.Fluoride treatment strengthens tooth enamel by converting hydroxyapatite, Ca5(PO4)OH, into fluorapatite, Ca5(PO4)3F. Fluoraparite is stronger and more resistant to acid than hydroxyapatite. If the solubility of fluorapatite is 6.1 x 10^-8 mol/L, what is its Ksp? Ca5(PO4)3F(s) -> 5Ca^2+ + 3PO4^3- + F-
- What will be the pH of a buffer solution containing an acid with a pKa of 5.4 with an acid concentration equivalent to that of its conjugate base?The ionization constant Ka for nitrous acid is 4.6x10⁻⁴. What are the the pKa for nitrous acid and the pH of a 0.1 M solution of this weak acid?The pH of an aqueous solution of weak monoprotic acid is 3.15. What is the initial concentration of the acid if the pKa of the acid 5.74?