could u pls tell me some equallences for some chem. procees?

Question

only numbers

Answer 1

Lets say you titrate some HCl with some NaOH solution and monitor with some litmus paper (I know this is a crude way of doing it, but just for example)

The reaction is:

HCl(aq) + NaOH(aq) --> NaCl(aq) + H2O(l)

after you add some NaOH solution you check the solution with the litmus paper and it turns red - that means there is still acid in the mixture - you have not reached equivalence.

There will be a point when you put the litmus in and it does not change color. That is the equivalence point. The reaction is finished. All the HCl is neutralized, and if you add a little more NaOH solution and check again, the litmus paper will turn blue - you have now gone PAST equivalence.

Now you have excess NaOH in the solution.

Answer 2

what is an equallence?

Answer 3

Please speak English, not Engrish.