How do I tackle Kc questions?

I like to use something called the ICE method:I = initial moles C = Change in molesE = equilibrium moles once you draw the ICE table with the formula on top you simply fill in the blanks. Now remember, in terms of change for products it will always be adding on and for reactants it will always be taking away because in any reaction the reactants decrease and products increase. Finally you must divide all your values by the volume to get concentration as this is what goes into the Kc formula, which is products over reactants. And molecule with a big number in front, will go to the power of that number once in the formula. Once you calculate that it’s simply about getting your units which you can mimic your formula to calculate.

Answered by Chemistry tutor

2163 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

A buffer was made by mixing 20cm3 of 0.05M NaOH and 20cm3 of 0.25M propanoic acid. Calculate the pH. Ka=1.34x10^-5


Which of the following shows the formation of the intermediate in the mechanism for the reaction between ethene and bromine?


Why does bromine water become colourless upon the addition of ethene, but not ethane? What is this reaction called?


Calculate the concentration, in mol dm-3, of a solution of chloric (I) acid, HOCl , which has a pH of 4.23. Chloric acid is a weak acid, with Ka = 3.72 x 10^-8


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning