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...Topic chemical kinetics appendices appendix graphical determination of reaction rate lab activity a assignment b answer key problems factors affecting the reactions teacher notes grade chemistry introduction can be calculated by studying change in amount product or reactant at different times average using following formula substance time rateamount endamount initially final tiime initial this calculation however is only over period it would more useful to know specific during called instantaneous determined measuring several data graph created and drawing tangent any finding slope that reality calculus needed find but an approximation line as shown figure below do select two points on calculate rise run loss versus g instant t n c e r f o datacurve u m s continued purpose you will measure mass previous rates involved hcl caco cacl h co caution aq l acid gloves goggles clothing carbon dioxide released protection must worn procedure place large pieces into paper cup filter scale pour ml...