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Question 412

The rate of change of the concentration C C\,C of a chemical reagent in a reaction is modeled by the differential equation

dCdt=8tln⁡tC,t>0 \frac{\text{d}C}{\text{d}t} = \frac{8t \ln t}{C}, \quad t > 0 dtdC​=C8tlnt​,t>0

where t t\,t is the time in seconds. Given that the concentration is 6 units when t=1t = 1t=1, solve the differential equation to find an expression for the concentration at any time ttt, giving your answer in the form C2=f(t)C^2 = f(t)C2=f(t).

[6]
Markscheme

Integration Questions

  1. A Level
  2. /Maths
  3. /Integration

864 exam-style questions on Edexcel A Level Maths Integration, covering 11.1 Integrating Standard Functions, 11.2 Integrating f(ax + b), 11.3 Using Trigonometric Identities, 11.4 Reverse Chain Rule, 11.5 Integration by Substitution, 11.6 Integration by Parts, 11.7 Partial Fractions, 11.8 Finding Areas, 11.9 The Trapezium Rule, 11.10 Solving Differential Equations, and 11.11 Modelling with Differential Equations. Each one has a worked solution and a mark scheme showing where the marks go.

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