Answer:
hold on this will take me awhile
Explanation:
Compaction and cementation
The strong Base with a pH of 12 is reduced by 4 units upon being added with solution Y. If you added a strong acid to the strong base, all ions are present in the solution, yes? So every OH- is neutralised by every H+ for example, meaning the resultant pH should be 7. The resultant pH is only 8 however, so solution Y must be a <em>weak acid </em>only!
A forest fire is considered a chemical change because of the changing of the wood by combustion, which is not a physical change.
