Example:
Procedure
Observation
Colourless gas is released. A “pop” sound produced when the wooden splinter is placed at the mouth of the test tube.
Inference
Hydrogen gas is released
Chemical Equation
H2SO4 + Zn → ZnSO4 + H2
Acids react with metal carbonates produces salt, water and carbon dioxide
Example:
Procedure
Observation
Colourless gas is released. The gas turn lime water chalky.
Inference
Sulphuric acid reacts with calcium carbonate.
The gas released is carbon dioxide.
Chemical Equation:
H2SO4 +CaCO3 → CaSO4 +CO2 + H2O
Acids react with bases produces salt and water
Example:
Hydrochloric acid + Magnesium Oxide
Procedure
Observation
Inference
Chemical Equation
2HCl + CuO → CuCl2 + H2O
Example:
Ethanoic Acid + Sodium Hydroxide
CH3COOH + NaOH → CH3COONa + H2O
Hydrochloric Acid + Ammonia Solution
HCl + NH3 → NH4Cl