Question

In: Chemistry

A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4,KHC8H4O4, was prepared by dissolving 0.4877 g...

A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4,KHC8H4O4, was prepared by dissolving 0.4877 g of potassium hydrogen phthalate in about 50 mL of water. The molar mass of potassium hydrogen phthalate is 204.22 g/mol. Titration with a KOH solution required 23.41 mL23.41 mL to reach a phenolphthalein end point. What is the molarity of the KOHKOH solution?

Solutions

Expert Solution


Related Solutions

(13) Hydrogen phthalate ion, HC8H4O4–, from potassium hydrogen phthalate (abbreviated as “KHP”; formula = KHC8H4O4), is...
(13) Hydrogen phthalate ion, HC8H4O4–, from potassium hydrogen phthalate (abbreviated as “KHP”; formula = KHC8H4O4), is a weak acid. In an acid-base titration, a 50.0-mL solution of 0.100 M “KHP” solution is titrated with NaOH solution of unknown concentration. The following net ionic equation represents the reaction that occurs during titration: HC8H4O4–(aq) + OH– (aq) → C8H4O42–(aq) + H2O(l)    (a) If the titration requires 34.0 mL of NaOH solution to reach equivalent point, calculate the molar concentration of NaOH...
A sample of potassium hydrogen phthalate (KHC8H4O4), which is an acid, with a mass of 0.7292...
A sample of potassium hydrogen phthalate (KHC8H4O4), which is an acid, with a mass of 0.7292 g is dissolved in water and used to standardize a solution of cesium hydroxide. An endpoint is reached when 34.61 mL of cesium hydroxide has been added. Determine the molarity (in mol/L) of the cesium hydroxide solution. Report your answer to four significant figures.
Each of the following problems relates to the titration of either potassium hydrogen phthalate (KHP, KHC8H4O4)...
Each of the following problems relates to the titration of either potassium hydrogen phthalate (KHP, KHC8H4O4) or citric acid (H3C6H5O7) with potassium hydroxide. Balance each chemical equation and then proceed to the following problems. __ KHC8H4O4 (s) + __ KOH (aq) → __ K2C8H4O4 (aq) + __ H2O (l) __ H3C6H5O7 (aq) + __KOH (aq) → __K3C6H5O7 (aq) + __ H2O (l)
(a) Potassium iodate solution was prepared by dissolving 1.022 g of KIO3 (FM 214.00) in a...
(a) Potassium iodate solution was prepared by dissolving 1.022 g of KIO3 (FM 214.00) in a 500 mL volumetric flask. Then 50.00 mL of the solution was pipetted into a flask and treated with excess KI (2 g) and acid (10 mL of 0.5 M H2SO4). How many millimoles of I3− are created by the reaction b) The triiodide from part (a) reacted with 37.57 mL of Na2S2O3 solution. What is the concentration of the Na2S2O3 solution? (c) A 1.223...
Question 1 A monoprotic solid acid, Potassium Hydrogen Phthalate (aka, KHP), KHC8H4O4, (molar mass = 204.22...
Question 1 A monoprotic solid acid, Potassium Hydrogen Phthalate (aka, KHP), KHC8H4O4, (molar mass = 204.22 g/mol) is used to standardize solutions of NaOH. (see KOTZ p. 218, and problem 72.) A student weighs out 1.3009 g of KHP and dissolves it in some water. The student then performs a titration with a solution of unknown concentration of NaOH, using 41.20 mL to reach the equivalence point. What is the Molarity of the NaOH solution? Question 2 25.00 mL of...
a) A standard ZnCl2 solution is prepared by dissolving 0.6328 g of Zn in an HCl...
a) A standard ZnCl2 solution is prepared by dissolving 0.6328 g of Zn in an HCl solution and diluting to volume in a 1.00 L volumetric flask. An EDTA solution is standardized by titrating a 10.00 mL aliquot of the ZnCl2 solution, which requires 10.84 mL of EDTA solution to reach the end point. Determine the concentration of the EDTA solution. b) A 1.4927 g sample of powdered milk is dissolved and the solution titrated with the EDTA solution prepared...
(a) A standard iodine solution was standardized against a 0.4123 g primary standard As4O6 by dissolving...
(a) A standard iodine solution was standardized against a 0.4123 g primary standard As4O6 by dissolving the As4O6 in a small amount of NaOH solution, adjusting the pH to 8, and titrating, requiring 40.28 mL iodine solution. What is the concentration of the iodine solution? As4O6 (s) + 6H2O -> 4H3AsO3 H3AsO3 +I3^- + H2O -> H3AsO4 + 3I^- + 2H^+ (b) The purity of a hydrazine (N2H4) sample is determined by titration with triiodide. A sample of the oily...
1. A 0.3178 g sample of potassium hydrogen phthalate is dissolved in 100 mL of water....
1. A 0.3178 g sample of potassium hydrogen phthalate is dissolved in 100 mL of water. If 33.75 mL of sodium hydroxide solution are required to reach the equivalence point, what is the molarity of the sodium hydroxide solution? 2. Does the amount of water used to dissolve the KHP standard affect the calculated molarity of the sodium hydroxide? Explain why or why not.
A 0.6972 g of impure potassium hydrogen phthalate (FW: 204.23) was dissolved in 30 mL of...
A 0.6972 g of impure potassium hydrogen phthalate (FW: 204.23) was dissolved in 30 mL of water and 2 drops of phenolphthalein was added. It required 24.83 mL of 0.1097 M NaOH for complete titration. a. how many moles of acid are present? b. how would the titration be affected if you used 0.8786 g of KHP? c. if you added 27.75 mL of NaOH instead of 25.83 mL, what would you expect to see? Note, this question does not...
A standard FAS solution is prepared by dissolving 0.1221 g of FAS (uncorrected mass) in water...
A standard FAS solution is prepared by dissolving 0.1221 g of FAS (uncorrected mass) in water in an amber bottle. The dry weight of the capped bottle is 256.77 g; the total weight of the bottle plus standard FAS solution is 750.13 g. Calculate the concentration of this solution in mg Fe/g soln. (Note that FAS has a density of 1.86 g/mL and contains 14.24087% Fe.) Then, a calibration standard test solution is made by dispensing 3.8514 g of the...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT