the pH of the resultant evolution will become pH7....explain why?
Answers
Answer:
Please Mark me as Brainlist , Your Answer
Explanation:
pH = -log10[H+] = 6.0 if it’s a solution of an acid
Now the problem here is we don’t know if this is a strong acid or a weak acid In fact we don’t know if it is an acid at all, it could be a base.
The pH does not identify the substance.
Plus we don’t even know what the solvent is!
Does the solution only contain one substance? I can also think of some other things which would alter the answer but why make things worse than they already are!
Believe me these points have an enormous bearing on the answer to the question. my first answer would be No!!
So lets assume it’s a solution of a strong acid in water
Therefore pH = -log10[H+] = 6.0
When diluted 100 times, the concentration will be reduced from 10–6 molar to 10–8 molar.
So does this mean the pH is now 8. No it doesn’t because H3O+ from H2O is at a higher concentration. Now the next bit isn’t 100% accurate but it will do for now.
Assume conc. of H3O+ from solvent (H2O) is 10–7 molar.
Therefore the overall conc. of H+ = 10–7 + 10–8 molar =1.1x10–6.96 approx.
Therefore
pH = approx. 7.0. if you want it more accurate it will be about 6.96 (assuming my maths is not too rusty!) Which is about what you would expect due to the levelling effect of H3O+ In other words the acid concentration is so low that it will not make much difference if any!
Enjoy, good luck with your studies!