An aqueous solution contains 0.204 M ascorbic acid (H2C6H6O6) and 0.123 M perchloric acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. [C6H6O62-] =  mol/L.

Given that pK₂ = 3.14 at 25 °C for HNO₂, what is the pH of 0.165 mol L-1 NaNO₂(aq) at 25 °C? What is the equilibrium concentration of HNO₂? pH = Number (Give your answer accurate to 2 decimal places.) Number mol L-¹ (Give your answer accurate to 2 signficant [HNO₂]eq figures.) =

5.

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,?) =

Please don't provide handwriting solution

If the pKA of R-COOH is 3.73 and the pH of an R-COOH/R-COO– solution is 3.88, which of the following is TRUE? Note: R-COO– is supplied as the neutral R-COONa salt.   [R-COOH] = [R-COO–] [R-COOH] > [R-COO–] It is not possible to make a buffer from R-COOH and R-COO– for this particular pH. [R-COOH] >> [R-COO–] [R-COOH] < [R-COO–]

Calculate the equilibrium Molarity of HPO4^2-