about the leacture

you can see the form of general exam attached below;
Applied Biochemistry Exam2 ID: …………………………
Q/1: fill in the blank with suitable concepts .
1- the main idea of volumetric analysis like titrations are …………………………………
2- To calculate the concentration of substance you need to ……………………….
And………………………..
3- The most common medicinal applications for aspirin were …………………. ,

……………… , ……………………… and ………………………..

4- the main reagent to distinguishing between fructose and benzoic acid is

……………………..

Q/2: a) 100 ml solution of acetic acid(CH3COOH) 0.25M titrated with 25ml of NH4OH . calculate the concentration of the base . ( atomic weight :H=1 ,N =14 , O=16 ,C=12 ). Then write the reaction equation.






b) for what the resgents can be used?
1- Barfoed s test:
2- Seliwanoff s Test:
3- Benedict s reagent:
4- Bial’s Test:


C) sometimes the yield of aspirin low than expected and other times higher. Explain?