7.35gm of dibasic acid was dissolved in water and diluated to 250 ml. 25ml of this solution was neutrilized by 15ml of 1N NaOH what is equivalent weight and molecular weight of acid?

the solar system used to have much dust particles option no d

i think it's letter a.

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

answerlinnaeus;