more doubts in the CHEM syllabus

[The Ultimate]

the syllabus is sooo CONFUSING!!! :x
i don't get what these mean, and even if i do, i don't understand them.......

1) Describe in outline the usefulness of chromatography in separating and identifying the product of hydrolysis of carbohydrates and proteins.

2) Describe the reactivity series as related to the tendancy of a metal to form positive ions, illustrated by its reaction, with aqueous ions, the oxides of other metals..... WHat does this mean......i have no idea what i just typed... :?

3) Plus how does a base react with ammonium salts? Or does it? (the syllabus says it does!!!) :evil:

 

[SuperXDE]

the syllabus is sooo CONFUSING!!! :x
i don't get what these mean, and even if i do, i don't understand them.......

1) Describe in outline the usefulness of chromatography in separating and identifying the product of hydrolysis of carbohydrates and proteins.

2) Describe the reactivity series as related to the tendancy of a metal to form positive ions, illustrated by its reaction, with aqueous ions, the oxides of other metals..... WHat does this mean......i have no idea what i just typed... :?

3) Plus how does a base react with ammonium salts? Or does it? (the syllabus says it does!!!) :evil:

Ah.... as it says ... for one ... Describe how chromatography is useful ( Checking for Purity , DNA Electrophoresis in matching Crime Suspect DNAs , and in Law as well ... , Checking for purity of Commercial foods which are doubted to contain illegal materials? )

Tendency of a metal to form positive ions would mean that it is more reactive , Like Potassium which is more reactive than copper and gold.. and Potassium reacts with water and reduces other metal oxides , metals which are of lower reactivity.

The Reactivity series is like that , Descending order ( K Na Ca Mg Al [C] Zn Fe Sn Pb [H] Cu Ag Au Pt ) Where Carbon and Hydrogen are included for comparison. Potassium is the most reactive while Platinum is the least.

And how does a base react with ammonium salts , for example NaOH + NH4NO3 --> NH3+H2O+NaNO3 I believe...

Hope I helped.

 

[shalado95]

3) Plus how does a base react with ammonium salts? Or does it? (the syllabus says it does!!!) :evil:

...another example would be.. NH4Cl (aq) + NaOH (aq) ----> NaCl (aq) + H2O (l)+ NH3 (g)