What are the different chemicals in colored candles that the white candles do not have That make them burn faster?
65 colored candles, it's the saturation of the color. For more detailed info, click the link below.
What materials do you need for the experiment to determine if light candles burn faster than dark candles?
In the science fair project do white candles burn faster than colored candles do you have to burn them all at the same time?
All else being held constant - the dependent variable is the composition of the chemical(s) used to color the colored candles. Some additives will speed burning because they are themselves flammable. Some will slow burning because they are less flammable. Some will cause the melting point of the wax to be depressed so that the wax melts quicker - and as it melts and drains away, the candle will burn faster. A more critical factor…
light coloured candles do burn faster than darker coloured candles for one main reason. The darker the candle, the more dye molecules are involved in the candle which are non-flammable. Therefore, the lighter the candle, the less dye molecules are involved minimising the risk of the dye molecules interfering with the combustion process.