Lesson Worksheet: Volumetric Analysis Chemistry
In this worksheet, we will practice describing volumetric analysis and using results from titration experiments to calculate the concentration of a solution.
Q1:
A titration experiment was performed to determine the concentration of sulfuric acid using a known concentration of potassium hydroxide. 100 mL of sulfuric acid was placed in a conical flask and a few drops of phenolphthalein indicator were added. A 0.6 M solution of potassium hydroxide was then slowly added into the conical flask. The amount of potassium hydroxide added and any observations were recorded.
Volume of Added (mL) | 35.4 | 35.6 | 35.8 | 36.0 | 36.2 | 36.4 | 36.6 | 36.8 | 37.0 | 37.2 | 37.4 | 37.6 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Observations | Colorless | Colorless | Colorless | Pink color that fades quickly to colorless | Pink color that fades quickly to colorless | Pink color that fades slowly to colorless | Pink color that fades slowly to colorless | Pink color that lasts ~30 seconds | Pink | Pink | Pink | Pink |
At what volume was the end point of the reaction reached?
What was the concentration of the sulfuric acid? Give your answer to 3 decimal places.
Q7:
During a titration, 22.4 mL of 0.100 M was required to neutralize the acidic analyte.
Calculate the number of moles of sodium hydroxide in the titer.
- A0.224 mol
- B mol
- C4.46 mol
- D mol
- E2.24 mol
Calculate the number of grams of sodium hydroxide in the titer. [, , ]
Q8:
A student performed a neutralization titration. The titration took 80 mL of an 0.500 M solution to neutralize 241 mL of solution. Determine the concentration of in units of millimolar.
- A15.0 millimolars
- B0.166 millimolars
- C1.50 millimolars
- D0.500 millimolars
- E166 millimolars
Q10:
A student performs a neutralization titration. The titration took 80.0 mL of a 0.50 M solution to neutralize 241 mL of solution. Determine the concentration of in units of molarity, giving your answer to 2 decimal places.