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Lesson: Titration Calculations

Worksheet • 7 Questions

Q1:

Sulfuric acid ( H S O ) 2 4 is a diprotic acid. A 31.5 mL aliquot of aqueous sulfuric acid was titrated against 0.0134 M aqueous sodium hydroxide. Calculate the molar concentration of the aqueous sulfuric acid given that 23.9 mL of the sodium hydroxide solution was needed to reach the endpoint of the titration.

Q2:

Phosphoric acid ( H P O ) 3 4 is a triprotic acid. A 13.8 mL aliquot of 0.176 M aqueous phosphoric acid was titrated against 0.110 M aqueous sodium hydroxide. Calculate the volume of sodium hydroxide solution needed to reach the endpoint of the titration.

Q3:

Oxalic acid ( C H O ) 2 2 4 is a diprotic acid. A solid sample with a mass of 0.7984 g, containing oxalic acid, was titrated against 0.2283 M aqueous sodium hydroxide. Calculate the percent mass of oxalic acid in the sample given that 37.98 mL of the sodium hydroxide solution was needed to reach the endpoint of the titration.

Q4:

A 20 mL sample of aqueous nitric acid ( H N O ) 3 is titrated against a 0.047 M solution of barium hydroxide B a ( O H ) 2 . What is the concentration of the nitric acid if an average volume of 55 mL of barium hydroxide solution is needed to reach the end-point of the titration?

Q5:

Sulfuric acid ( H S O ) 2 4 is a diprotic acid. A 36.3 mL aliquot of 0.0529 M aqueous sulfuric acid was titrated against 0.0411 M aqueous sodium hydroxide. Calculate the volume of the sodium hydroxide solution needed to reach the endpoint of the titration.

Q6:

Adding aqueous mercury(II) nitrate to aqueous chloride ions results in the precipitation of mercury(II) choride:

Calculate the concentration of chloride ions in a 0.250 mL aqueous sample if 1.46 mL of 0.825 mM aqueous mercury(II) nitrate is required for the end-point to be reached.

Q7:

A solution of N a C N is titrated against a standard 0.0100 M solution of A g N O 3 . When cyanide ions are in excess, the silver ions react to produce the soluble A g ( C N ) 2 complex. However, when silver ions are in excess, solid A g C N precipitates. If A g C N begins to precipitate after the addition of 28.72 mL of the A g N O 3 titrant, how many grams of N a C N are present in the analyte solution?

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