- Why is diluted sulphuric acid [H2SO4] added while preparing standard Mohr’s solution?
It is added to prevent hydrolysis of ferrous salt.
- Can you use hydrochloric acid [HCl] or nitric acid [HNO3] in potassium permanganate [KMNO4] titrations? Why?
No. HNO3 is itself an oxidising agent whereas HCl being oxidisable to chlorine and hydrogen consumes permanganate.
- What is the oxidation number of manganese in potassium permanganate [KMNO4] ?
Oxidation number of manganese in KMNO4 is 7.
- Why are hot solutions not poured into graduated apparatus like durette, measuring flask etc.?
Hot solutions may expand glass and thereby introduce errors in volume measurement.
- Why do we heat the oxalic acid to 60o– 70o C?
Heating is done to enhance the rate of reaction and increase activation energy.
- What happens if we heat oxalic acid above 100o C?
It may decompose oxalic acid into carbon dioxide [CO2] and carbon monoxide [CO].
- What is autocatalysis?
The reaction in which product acts as a catalyst to the reaction.
- Should a titration flask also be rinsed?
No, rinsing of the flask will increase the volume more than pipetted one.
You can also get Class XII Practicals on Biology, Physics, and Physical Education.
can you provide us the practical record file matter of organic compounds
http://notesforfree.com/2017/09/14/salt-analysis-chemistry-class-xii-practicals/
Thank you very much
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Tq helpful
helpful
thank u
Very helpful.Thanks loads!!!
Very Helpful
help ful
It was very neccessary for me thanks a lot.
Y don’t you provide..answer s too?
answers are there tooo………….
These questions are very helpful can you provide some more questions
Very helpful for me
Thank u….really helpful
helpful…..
Yes it is helpful
Can you provide us the chemical and ionic equations of all titration in class XII chemistry practicals
Thank u sir…
Very helpful….
Thanksss but i wanna moree questions
Helpful
Why titration done in acidic medium?
Increasing the Temperature increases the rate of reaction and decreases the activation energy
It is really use full us for scoring fullmark in practical examination ,,,,thank you so much,..expecting much more
Can u publish 10 analysis of simple salt
very usefull
Very helpful
Thank u
these questions were asked????
I am an idiot.
Vey help full for me so thanks alot .