Chemistry Waec Practical Questions And Answers

Here are 20 possible WAEC Chemistry practical questions that students might encounter:

Titration Experiment:

Determine the concentration of a given sodium hydroxide solution using a standard hydrochloric acid solution.

Calorimetry:

Investigate the heat of reaction between magnesium and hydrochloric acid.

Electrolysis:

Electrolyze a copper sulfate solution and analyze the products formed at the anode and cathode.

Gas Collection:

Collect and measure the volume of hydrogen gas evolved during the reaction of zinc with dilute sulfuric acid.

Preparation of a Salt:

Prepare pure, dry crystals of copper(II) sulfate.

Colorimetry:

Determine the concentration of a given potassium manganate(VII) solution by colorimetric analysis.

Qualitative Analysis:

Identify the cations present in a given mixture using qualitative analysis techniques.

Tests for Gases:

Perform tests to identify carbon dioxide, oxygen, and hydrogen gases.

Thermal Decomposition:

Investigate the thermal decomposition of a metal carbonate, e.g., copper(II) carbonate.

Rate of Reaction:

Study the effect of concentration on the rate of reaction between sodium thiosulfate and hydrochloric acid.

Identification of Anions:

Identify the anions present in a given salt mixture using appropriate tests.

Solubility Tests:

Determine the solubility of different salts in water and classify them as soluble or insoluble.

Volumetric Analysis:

Determine the percentage purity of a given sample of sodium carbonate by acid-base titration.

Enthalpy Change:

Investigate the enthalpy change during the reaction between sodium hydroxide solution and hydrochloric acid.

Hydrogen Peroxide Decomposition:

Study the decomposition of hydrogen peroxide using manganese(IV) oxide as a catalyst.

Tests for Functional Groups:

Identify the functional groups present in organic compounds through chemical tests.

Preparation of Oxygen:

Collect and test oxygen gas obtained from the decomposition of hydrogen peroxide.

Crystallization:

Separate a mixture of common salts through the technique of crystallization.

Conductivity of Solutions:

Investigate the electrical conductivity of different aqueous solutions.

Redox Titration:

Determine the concentration of a given iron(II) sulfate solution using a standard potassium manganate(VII) solution.