Rates, Equilibrium & pH 0.0 / 5 ? ChemistryEquilibriaA2/A-levelOCR Created by: meganlyyCreated on: 07-01-18 22:25 What is the definition of reaction rates? Change in the amount of reactants or products per unit time. 1 of 6 Name four ways to follow rate of reaction. Measure volume of gas evolved, measure loss in mass as gas is evolved, use colorimetry to measure colour change of reaction, measure pH of reaction. 2 of 6 What graph is the rate a tangent of? On a concentration-time graph the rate is the tangent. 3 of 6 What does the order of reaction with respect to particular reactant show? Shows how the reactant affects the rate. 4 of 6 What is the order when doubling reactant's conc and rate stays the same, doubles, or quadruples? Stays the same - 0 order, doubles - 1st order, quadruples - 2nd order. 5 of 6 What are two ways to find a reactant's order? Plot a conc-time graph or use initial rates method. 6 of 6
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