Question

1. list three common household items. identify one chemical property of each item.

Explanation:

1. Vinegar: Its chemical - acetic acid can react with baking soda (a chemical reaction is a chemical property). This is a common acid - base reaction where acetic acid (CH₃COOH) in vinegar reacts with sodium bicarbonate (NaHCO₃) in baking soda to produce carbon dioxide gas, water, and sodium acetate.
2. Baking Soda: It decomposes on heating (a chemical property). When heated, sodium bicarbonate decomposes into sodium carbonate, water, and carbon dioxide gas. The chemical equation is 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂↑.
3. Steel Wool: It rusts in the presence of oxygen and water (a chemical property). Steel wool, mainly made of iron, reacts with oxygen and water in the air to form iron oxide (rust), which is a chemical change.

Answer:

1. Vinegar, its chemical property is reactivity with baking - soda.
2. Baking Soda, its chemical property is thermal decomposition.
3. Steel Wool, its chemical property is rusting in air.