Reactions of acids

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536
Question 9
Medium

A student is performing a titration to analyze a solution of sodium hydroxide (NaOH\text{NaOH}NaOH).

a.

The student measures 25.0 cm325.0\text{ cm}^325.0 cm3 of sodium hydroxide solution with a concentration of 4.80 g/dm34.80\text{ g/dm}^34.80 g/dm3. Calculate the mass of sodium hydroxide in this sample. Use the conversion: 1 dm3=1000 cm31\text{ dm}^3 = 1000\text{ cm}^31 dm3=1000 cm3.

[3]
b.

During the titration, the following volumes of dilute sulfuric acid were recorded to neutralize the sodium hydroxide:

  • Trial 1: 24.1 cm324.1\text{ cm}^324.1 cm3
  • Trial 2: 20.3 cm320.3\text{ cm}^320.3 cm3
  • Trial 3: 24.3 cm324.3\text{ cm}^324.3 cm3
  • Trial 4: 24.2 cm324.2\text{ cm}^324.2 cm3

Identify the anomalous trial and calculate the mean volume of acid used, using only the concordant results.

[3]

Reactions of acids Questions

  1. GCSE
  2. /Chemistry
  3. /Reactions of acids