Measuring the invisible: how chemists track the speed of change
In short: Chemical reactions aren't just instant transformations; they are processes with measurable speeds. This video explains how to quantify those speeds by tracking the disappearance of reactants or the appearance of products.
Reaction rate is defined as the measure of how quickly substances on the left side of a chemical equation (reactants) convert into substances on the right side (products). To study this, chemists use two primary methods: monitoring the decrease in reactant mass or measuring the increase in product volume.
To illustrate these concepts, the footage shows hydrochloric acid reacting with calcium carbonate (marble chips). Scientists generate a 'mass of reactants against time' plot by weighing a conical flask containing the blend and a cotton wool stopper; finding the gradient at any given moment reveals the rate.
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Sources
- Summary by Intellect · source: Rates of Reactions - Part 1 | Reactions | Chemistry | FuseSchool
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