Regarding phases 2 or 3 of the experiment, if more or fewer drops of reagent d (sodium hydroxide) were needed to get the same blue color as in phase 1, what does this tell us about the quality of the water when yeast was consuming nutrients in the water? did something similar to eutrophication occur? **phase 2 used quite a lot more drops than phase 3**

asking the goog might u get an answer

a

explanation:

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol