10. Calculate the concentrations of all species in a 0.930 M Na₂SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are K₁₁=1.4×10-² and K₂2-6.3×10-8. a2

A solution of sodium cyanide, NaCN, has a pH of 11.30. How many grams of NaCN are in 865 mL of a solution with the same pH? Kb (CN–) = 1.7 × 10–5 mass =  ___________ g *I asked this prevously and 1.81 x 10^-12 is the wrong anwser for this question, if you get that.

The OH– concentration in a 1.0 × 10–3 M Ba(OH)2 solution is Group of answer choices 0.50 × 10–3 M. 1.0 × 10–3 M. 2.0 × 10–3 M. 1.0 × 10–2 M. 0.020 M.

Calculate the concentrations of all species in a 0.900 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are ?a1=1.4×10−2 and ?a2=6.3×10−8.

The H⁺ concentration in an aqueous solution at 25 °C is 5.9 × 10⁻⁴. What is [OH⁻]?

Calculate the pH and concentration of species present in a polyprotic acid solution. For a 9.03x10 M solution of H,CO3, calculate both the pH and the CO," ion concentration. -2 H2CO3 + H20 H;0" + HC03 Kal = 4.2x10-7 HCO3 + H2O=H30* {co,?- Ka2 = 4.8x10 11 pH = [Co,?) =

Barbituric acid, HC4H3N2O3, is used ito prepare various barbiturate drigs (used as sedaives). Without solving the quadratic equation, calculate the concentration of hydrogen ion in a (2.30x10^-1) M solution of the acid. The value of Ka is 9.8x10-5. Express your answer to three significant figures. ------------------------------------------------------------------------------------------------------------------------ What is the concentration of hydroxide ion in a (7.20x10^-2) M aqueous solution of methylamine, CH3NH2? The Kb for methylamine is 4.4x10-4. You need to solve the quadradic equation for this problem. Express your answer to three significant figures.  ------------------------------------------------------------------------------------------------------------------------ A solution of lactic acid, HC3H5O3, on a laboratory shelf was of undetermined concentration. If the pH of the solution was found to be (2.51x10^0), what was the concentration of the lactic acid? The Ka of…

The concentration of hydroxide ion in an aqueous solution at 25°C is 7.2 x 10-4 M. What is the concentration of the hydronium ion? 1 2 3 4 6. C 7 8 9. +/- x 100 +

Carbonic acid, H 2CO 3, is a diprotic acid whose Ka1 = 4.3 x 10 -/ and K ions in a 0.18 M H 2CO 3 solution. a2 = 5.6 x 10 -11. %3D 2- Determine the concentration of CO 3

Selenous acid is a diprotic acid, for Ka1 = 9.43 x 10-3 and Ka2 = 7.39 x10^-8. Determine the concentration of selenite (SeO2-) in a 0.18 M selenous acid solution.