"Remember, not all reactions happen at the same speed. Some are fast, while others are slow."Chemical reactions vary in speed or rate of reaction.Fast reactions include combustion (e.g., fire) or acid-base neutralization.Slow reactions include rusting of iron or fermentation.The speed depends on factors such as,TemperatureConcentration of reactantsSurface areaPresence of a catalystUnderstanding this helps in controlling reactions in industries, medicine, and even cooking.