howing how volume of titrant (in mL) leads to the determination of the amount of t-butylbromide remaining in the reaction mixture at the 15 minute timepoint for the 75% ispropanol/water reaction medium

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Naoh + hbr -> nabr (salt) + h2o ca (oh)2 + 2hbr - - - > ca (br)2 + 2h2o