Chemical Equilibrium and Calculating Initial Concentration.

Question

How do you calculate the initial concentration?

I am a college student, and I've been told finding it is easier than how I make it out to be.

Here's exactly what it says in my lab:

"Find the initial concentration (M) of Fe^3+. Note: the total volume of solution is 10.00 mL (0.01000 L).

I am working with the equation Fe^3+ + SCN^- -> FeSCN^2+

Let me know if you need more information.

Thank you.

Answer 1

Hi Matthew,

Once you understand the significance of moles as a ratio in every equation it really becomes as easy as they say.

The first step would be to understand the molecular mass of each element in the equation. FE(Iron), SCN(Thiocyanate(cyanide with sulphur).

Once you have these you can represent them in proportion as represented in the equation(this is the same as moles). That is ratio of 1:1:1 for substrate :substrate: product.

We can solve it from her with a bit of math I would be more than happy to show you in one of our sessions!

Kind regards,

Bunie MD, MPharm