You are on a field trip to a nearby lake for biology class and want to perform a quick analysis of the water’s approximate ph level. which ph measurement system would you use and why?

Sample Response: Using pH paper would be best for doing a quick measurement in the field. It does not need to be calibrated and the papers provide an instant estimate. Answer on Ed

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

it's c (engineer's do their work with mechanical stuff not on any living being)