Which of the following statements about the equivalence point of an acid-base titration is true?
In an acid-base titration, a 75.0 mL sample of a calcium hydroxide solution requires 36.6 mL of 50.0 mM hydrochloric acid to react completely. Calculate the molarity of the calcium hydroxide solution.
Oxalic acid reacts with aqueous sodium hydroxide to produce sodium oxalate and water: Calculate the volume of a 0.3300 M sodium hydroxide solution needed to titrate 15.00 mL of 0.1500 M oxalic acid.
Potassium hydroxide reacts with dilute aqueous phosphoric acid to produce potassium hydrogen phosphate: Calculate the volume of a 0.1500 M solution of potassium hydroxide needed to titrate 40.00 mL of 0.06560 M aqueous phosphoric acid.
Why should a standard sodium hydroxide solution be titrated against a standard acid solution before use as a titrant?
Titration of a 50.0 mL sample of hydrochloric acid required 35.23 mL of 0.250 M aqueous sodium hydroxide. Calculate the concentration of the hydrochloric acid.
Titration of a 20.0 mL aqueous solution of sulfuric acid required 1.70 mL of 0.0811 M aqueous sodium hydroxide. Calculate the concentration of sulfuric acid in the sample.
Calculate the volume of 0.600 M hydrochloric acid needed to react completely with 2.50 g of sodium hydrogen carbonate.
A solution contains 40.0% of acetic acid by mass and has a density of 1.052 g/mL. What mass of calcium hydroxide is needed to neutralize 23.5 mL of this solution?
Calculate the volume of 0.0150 M hydrochloric acid needed to titrate 150 mL of 0.0200 M aqueous calcium hydroxide.
Potassium hydroxide reacts with dilute sulfuric acid to produce aqueous potassium sulfate and water: Calculate the volume of an 8.83 mM solution of potassium hydroxide needed to react completely with 40.00 mL of 0.111 mM sulfuric acid.
Nitric acid reacts with potassium hydrogen phosphate to produce potassium nitrate and phosphoric acid: Calculate, to 3 significant figures, the volume of 0.09992 M nitric acid needed to react completely with 0.3242 g of potassium hydrogen phosphate.
Potassium acid phthalate reacts with sodium hydroxide to form potassium sodium phthalate: A 0.2500 g sample of potassium acid phthalate requires 25.45 mL of a standard sodium hydroxide solution to react completely. Calculate the concentration of this solution, to 3 significant figures.
When using phenolphthalein as an indicator in acid–base titrations, why is it better to use the base as the titrant?