Question: The rate constant of a first order reaction is $15 \times 10^{- 3}s^{- 1}$. How long will $5.0$ ...

Question

The rate constant of a first order reaction is $15 \times 10^{- 3}s^{- 1}$ . How long will $5.0$ g of this reactant take to reduce to $3.0$ g?

Answer 1

$t = \frac{2.303}{k}\log\frac{a}{a - x}$

Or $t = \frac{2.303}{15 \times 10^{- 3}}\log\frac{5}{3} = 34.07s$

Question: The rate constant of a first order reaction is \(15 \times 10^{- 3}s^{- 1}\). How long will \(5.0\) ...