# Linked Questions

20 votes
2 answers
1k views

### Can in any case the faster step of the reaction be rate determining?

I found a sentence in book which states the reverse step of this reaction ( I forgot what was it!) has the faster step as rate determining . Even Rate determining step-Wikipedia states: In ...
• 1,786
3 votes
1 answer
24k views

### Relationship between rate equation and equilibrium constant

I have read mannaia's answer on the question of 'rate order and confusion', as well as Nicolau Saker Neto's answer to a related question. They have both been very helpful. As I understand, the ...
3 votes
2 answers
10k views

### Why must the rate law be experimentally determined?

I am familiar with the idea that rate law must be determined experimentally. I am also familiar with the idea that there is no formulated way for coming up with the rate law besides just ...
• 259
10 votes
1 answer
1k views

### Unit consistency in rate equations

I suppose that my problem is not one of great profundity, but it is an annoying one. The problem is related to the measurement units involved in rate equations of different order. Not being a chemist ...
• 101
6 votes
1 answer
2k views

### Rate and order confusion

I just learned about rate and order... I just want to confirm if these three ideas are correct: If the first elementary step is the slow step, will the stoichiometric coefficients of the reactants in ...
• 2,413
4 votes
1 answer
2k views

### How do you find the average rate and instantaneous rate given a kinetics plot?

What is average rate? What is instantaneous rate? How do you find these? My teacher described finding the tangent to a graph. I am not sure what is meant by this.
• 375
4 votes
2 answers
554 views

### How are reaction rate laws derived?

Let's take the reaction $2A + B \rightarrow C$, with the assumption that this is an elementary reaction. If I'm only given this information, how would I derive the following forward rate law from ...
• 49
-3 votes
2 answers
276 views

### Why doesn't molecularity ever exceed 3?

Recently, I learnt that molecularity of a reaction is limited to 3 and even that is quite rare. I searched online and asked my teacher about this but the explanation given was that it is difficult for ...
1 vote
1 answer
179 views

### Where does the rate equation come from? (r = k [A]^x [B]^y)

Equations are great, but they're much better when you can understand them. I don't quite get why this works. Could someone explain it to me?r = k [A]^x [B]^y
• 31
3 votes
1 answer
58 views

### A "function of proportionality" in a rate law [closed]

I am currently studying rate laws and the determination of the order of a reaction. So first-order reactions remind me of linear functions $f(x)=kx$ while second-order reactions remind me of quadratic ...