How to use ICE tables

[Maayan Epstein 14B]

How do I know what to plug into ice tables? For example, I know that I can plug in molarity to find initial, change, and equilibrium. Will this work for pressure too?
Thanks!

[Chem_Mod]

Yes. Because, partial pressure in a gas reaction is essentially a way to represent concentration and you can use the ideal gas law to convert.

[Kevin ODonnell 2B]

This table may help to visualize it all, and is an example that uses Molarity.

[Eruchi Okpara 2E]

I'm still confused on how to find the change in molarity, can someone explain please? Does the number in front of the X come from the coefficient that is in front of the reactant or product?

[Michelle Wang 4I]

Hi Eruchi,
In this situation we don't know the exact change in molarity that occurs in the reaction. We know that when the Cu(NH3)42+ dissociates, it forms 4 mol of NH3 and 1 mol of Cu2+. We use the stoichiometric coefficients of the balanced chemical equations to write the x that is added or taken away. That is why the 4NH3 has a +4x change in molarity.

[tierra parker 1J]

I'm still confused on how to find the change in molarity, can someone explain please? Does the number in front of the X come from the coefficient that is in front of the reactant or product?

yes the coefficient of x is from the coefficients from the balanced equation. if the equilibrium concentration is given then you subtract the initial concentration from the equilibrium concentration