Question

A first order reaction has a rate constant 1.15 10⁻³ s⁻¹. How long will 5 g of this reactant take to reduce to 3 g?

Answer 1

From the question, we can write down the following information:

Initial amount = 5 g

Final concentration = 3 g

Rate constant = 1.15 10⁻³ s⁻¹

We know that for a 1^st order reaction,

= 444.38 s

= 444 s (approx)