Top answers

How do you calculate the units for Kc?

The units for Kc changes depending on the concentrations of each reactant and product in the equation. It can also be possible that there are no units for Kc because the concentrations at the top and the bot...
HM
Answered by Huma M. • Chemistry tutor
62204 Views

Why does the pH of neutral water drop when it is left out in an uncovered container on a worktop for a long period of time?

This question tests your knowledge on; the properties of non-metal oxides in solution, the concept of equilibrium, pH. Non-metal oxides such as (CO2, P4O10, SO2, etc) are acidic in solution. When left out on...
NG
3140 Views

What is the electronic configuration of Chlorine and of a chloride ion and explain why Chlorine is 'happiest' as a chloride ion.

Cl - 1s22s22p63s23p5 Cl- - 1s22s22p63s23p6 The 3p orbital is slightly unstable because of the single unpaired electron which is at a higher energy and wants to pair up, the 3p orbital is more stable when the...
MS
Answered by Molly S. • Chemistry tutor
16279 Views

Explain why a buffer solution is formed when excess weak acid is added to a strong base

Because the weak acid is in excess, all of the strong base will react to form water and a salt of the acid. Since there is still some of the acid in the reaction mixture at the end point, an acidic buffer is...
RK
Answered by Ryan K. • Chemistry tutor
18716 Views

Describe briefly how you would show that manganese(II) ions catalyse the reaction between manganate(VII) ions and ethanedioate ions, in dilute sulphuric acid.

Mix the reagents and record the time taken for a specific observation, e.g. disappearance of colour which is characteristic for this chemical reaction. We repeat this step and add more manganese(II) ions; a ...
SS
7237 Views