## Rate of Reactant

$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$

Erik Buetow 1F
Posts: 96
Joined: Fri Aug 30, 2019 12:15 am

### Rate of Reactant

Will the rate of reaction for reactants always decrease over time? Or is this only true for favorable reactions?

Kate Osborne 1H
Posts: 102
Joined: Fri Aug 30, 2019 12:16 am

### Re: Rate of Reactant

rate always decreases because as you form products you start to form reactants again

Fdonovan 3D
Posts: 101
Joined: Sat Aug 17, 2019 12:16 am

### Re: Rate of Reactant

Because reactants get depleted over time, the rate of the forward reaction will decrease. Initially, there are usually a lot of collisions between molecules which slows as more reactants go to products.

Sofia Barker 2C
Posts: 101
Joined: Wed Sep 18, 2019 12:21 am

### Re: Rate of Reactant

for any reaction aA --> bB + cC, the rate based on the concentration of reactants is negative (-1/a * d[A]/dt) because the concentration of reactants decreases over time as products are formed. In the reverse reaction, A becomes a product and thus its rate is positive because its concentration increases as more and more of it is formed over time.