Describe any further treatment the oxidized solution was carried through from this point on to isolation of final product. Offer an explanation for the role of or need for addition of further amounts of ammonium carbonate. Effervescent should have been noted during these additions. Offer a reaction which would account for this and the probable identity of the gas. What number of grams of product were obtained, describe its physical properties.

i'm pretty sure it is letter c.) car

where are the choice options?

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