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- K/s In this equation H2O +HF- H3O+ +F-1 H20 is a base and HF is its conjugated acid HF is an acid and F- is its conjugated base HF ica base and H30+ is its conjugated acid HF is an acid and H30 + is an base إلغاءNaHCO3 (aq) + CH3 COOH (aq) —> CO2 (g) + H2O (l) + CH3 COONa (aq) Calculate the molar concentration of 100ml of vinegar (CH3COOH) and 2.5 ml of baking soda (NaHCO3). Note that the concentration of table vinegar is about 1 mol/L and the density of baking soda is 2.2 g/cm3Part 1 of 2 Determine the pH of a 0.25 M NH3 solution. Be sure your answer has the correct number of significant digits. Note: K for NH3 is 1.78 × 10-5 pH = Part 2 of 2 x10 Determine the pH of a solution that is 0.25 M NH3 and 0.35 M NH4Cl. Be sure your answer has the correct number of significant digits. pH = X
- 2- Suppose a 0.025 M aqueous solution of phosphoric acid (H3PO4) is prepared. Calculate the equilibrium molarity of HPO properties of phosphoric acid in the ALEKS Data resource. Round your answer to 2 significant digits. M 0 X S ? You'll find information on theSuppose a 0.027 M aqueous solution of oxalic acid (H₂C₂O4) is prepared. Calculate the equilibrium molarity of C₂04. You'll find information on the properties of oxalic acid in the ALEKS Data resource. Round your answer to 2 significant digits. M 0 S ? OFF oloThe solubility of CaF, in water at 25 °C is measured to be 0.017 . Use this information to calculate K, for CaF,. sp Round your answer to 2 significant digits.
- In carrying out the first standardization in this experiment, a student used 0.5169 g of potassium hydrogen phthalate (KHP) and 24.17 mL of a NaOH solution are needed to reach the equivalence point. What is the concentration (in mol/L) of the student's NaOH solution? Include only the numerical answer (no units). be careful with significant digitIn a 4.9 mm aqueous solution of benzoic acid (C6H₂CO₂H), what is the percentage of benzoic acid that is dissociated? You can find some data that is useful for solving this problem in the ALEKS Data resource. O Round your answer to 2 significant digits. []% x10 X Ś |||Answer questions a through c: a. A CHEM 1215L student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH (aq), to a phenolphthalein end point. If the titration required 21.84 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide solution, NaOH (aq). (Remember that KHP is potassium hydrogen phthalate KHC8H4O4, NOT potassium hydrogen phosphorus!) b. The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phe- nolphthalein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of acetic acid, HC2H3O2 (aq), in the vinegar. c. Calculate the mass percent of acetic acid, HC2H3O2 (aq), in the vinegar using the mo- lar concentration for acetic acid, HC2H3O2 (aq), determined in part band assuming the density of the solution is 1.01 g/mL.
- Each row of the table below describes an aqueous solution at about 25 °C. Complete the table. That is, fill in any missing entries in the second and third columns. Round your entries for H,O to 2 significant digits, and your entries for pH to 2 decimal places. [1,0] solution pH x10 12 A 7.1 x 10 mol/L mol/L 0.090 8.4 x 10 mol/LSuppose a 0.034M aqueous solution of sulfuric acid (H₂SO4) is prepared. Calculate the equilibrium molarity of SO4 You'll find information on the properties of sulfuric acid in the ALEKS Data resource. Round your answer to 2 significant digits. M 1.9 S63 gallons of a 26% acid solution are mixed with 44 gallons of a 80% acid solution. What is the acid concentration of the resulting mixture? Round to the nearest percent.