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Edexcel A-Level Chemistry AS 9.3 The Rate of a Reaction From I the Time Taken for a Reaction Questions

For 1/t use a fixed reaction endpoint; for a graph draw a tangent at the requested time, form a large gradient triangle and attach numerator and time units.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Calculate relative rate as 1/time and report reciprocal-second units and suitable precision.
  • Draw a tangent at zero or a stated time and calculate its gradient from two points.
  • Derive rate units from the measured concentration, amount or gas volume divided by time.

Edexcel A-Level Chemistry AS 9.3 The Rate of a Reaction From I the Time Taken for a Reaction Questions question 1

[Maximum number: 1]

Rhubarb stems contain ethanedioic acid. Ethanedioic acid reacts with acidified potassium manganate(VII), KMnO4\mathrm{KMnO}_{4}, and decolorises the solution.

A student carried out an experiment using rhubarb juice as a source of ethanedioic acid.

The student used different volumes of rhubarb juice and a constant volume of manganate(VII) as shown. An indication of rate was calculated using 1÷t1 \div \mathrm{t}.

Complete the table.

Table for Question Edexcel A-Level Chemistry AS 9.3 The Rate of a Reaction From I the Time Taken for a Reaction Questions question 1 — Edexcel A-Level Chemistry AS
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