1) Calculate the molar concentrations of H+, CHO2-, and unionized, HCHO2 in a solution prepared by diluting 1.10 g of pure formic acid in 250 ml water. Assume that the acid is 4.60% ionized.
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1) Calculate the molar concentrations of H+, CHO2-, and unionized, HCHO2 in a solution prepared by diluting 1.10 g of pure formic acid in 250 ml water. Assume that the acid is 4.60% ionized.
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- The ka of an unknown acid, HYO₂, is determined to be 5 x 10⁻² empirically. What is the pH of a 0.1 M solution of HYO₂?Calculate concentration, when 0,2 moles of ammonium carbonate ((NH4)2CO3) is dissolved into water in a volumetric flask so that the final volume of the solution is 100 milliliters.Calculate the pH of a solution that is 0.195M in sodium formate (NaHCO2) and 0.24 M in formic acid (HCO2H). The Ka of formic acid is 1.77 x 10-4.
- Bacteria in the human mouth release enzymes to break up sucrose, and thenpolymerize glucose to form a bacterial plaque. When this glucose is digested, it formslactic acid, which causes tooth decay. Tooth enamel is made of calcium phosphate.Lactic acid has a Ka 1.38x10 -4 and ionizes into lactate and H3O+ ions. Assuming aninitial lactic acid concentration of 0.10 mol/L on your tooth, determine the pH(assume a 1:1:1 mole ratio) and the percent ionization. Should people be concernedwith plaque buildup? Justify your answer.Calculate the pH of a solution prepared by dissolving 0.37 mol of formic acid (HCO2H) and 0.23 mol of sodium formate (NaCO2H) in water sufficient to yield 1.00 L of solution. The Ka of formic acid is 1.8 x 10-4.Write the net-ionic neutralization reaction that occurs when HI (aq) is added to the buffer solution of formic acid (HCOOH) and sodium formate (NaHCOO).