Question

1. observe the combustion of a candle. identify each substance in the table below as a reactant or product. justify your claim with experimental evidence. substance reactant or product? evidence co₂ product b o₂ c the probe reading shows the quantity of this substance decreases as the candle burns. h₂o e the probe reading shows the quantity of this substance increases as the candle burns. this substance appears as condensation as the candle burns. reset

Explanation:

Step1: Analyze CO₂

In a combustion reaction, carbon - containing substances react with oxygen. Candle wax is a carbon - containing substance. When it burns, it produces carbon dioxide. The evidence that the quantity of CO₂ increases as the candle burns (from the probe reading) shows it is a product.

Step2: Analyze O₂

Oxygen is required for combustion. During the combustion of the candle, oxygen is consumed. Since the probe reading shows the quantity of O₂ decreases as the candle burns, it is a reactant.

Step3: Analyze H₂O

Candle wax contains hydrogen. During combustion, hydrogen combines with oxygen to form water. The evidence that the quantity of H₂O increases as the candle burns (from the probe reading) and the appearance of condensation show it is a product.

Answer:

Substance	Reactant or Product?	Evidence
O₂	Reactant	The probe reading shows the quantity of this substance decreases as the candle burns.
H₂O	Product	The probe reading shows the quantity of this substance increases as the candle burns. This substance appears as condensation as the candle burns.