Welcome to Master Notes, your academic companion for classes 9 to 12. Today, we embark on a journey through the intricacies of “Chemistry practical file class 12” demystifying the art and science behind these crucial components of your chemistry curriculum. Let’s delve into the significance, structure, and strategies that will empower you to navigate the practical world of chemistry with confidence.
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Class : 12th
Subject : Chemistry
Material : Practical
Chemistry practical file class 12 Experiments
- A. Surface Chemistry
(a) Preparation of one lyophilic and one lyophobic sol
Lyophilic sol – starch, egg albumin and gum - Lyophobic sol – aluminium hydroxide, ferric hydroxide, arsenous sulphide.
- (b) Dialysis of sol – prepared in (a) above.
(c) Study of the role of emulsifying agents in stabilising the emulsion of different oils.
B. Chemical Kinetics
(a) Effect of concentration and temperature on the rate of reaction between Sodium Thiosulphate and Hydrochloric acid.
(b) Study of reaction rates of any one of the following:
(i) Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentrations of Iodide ions.
(ii) Reaction between Potassium Iodate (KIO3) and Sodium Sulphite: (Na2SO3) using starch solution as an indicator (clock reaction).
C. Thermochemistry
Any one of the following experiments
(a) Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate.
(b) Enthalpy of neutralisation of strong acid (HCI) and strong base (NaOH).
(c) Determination of enthalpy change during interaction (Hydrogen bond formation) between Acetone and Chloroform.
D. Electrochemistry
Variation of cell potential in Zn/Zn2+|| Cu2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.
E. Chromatography
(a) Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values.
(b) Separation of constituents present in an inorganic mixture containing two cations only (constituents having a large difference in Rf values to be provided).
F. Preparation of inorganic compounds
Preparation of double salt of Ferrous Ammonium Sulphate or Potash Alum.
Preparation of Potassium Ferric Oxalate. - G. Preparation of organic compounds
Preparation of any one of the following compounds
i) Acetanilide ii) Di-benzalAcetone iii) p-Nitroacetanilide iv) Aniline Yellow or 2-Naphthol Aniline Dye. - H. Tests for the functional groups present in organic compounds:
Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (Primary) groups.
I. Characteristic tests of carbohydrates, fats and proteins in pure samples and their detection in given foodstuffs.
J. Determination of concentration/molarity of KMnO4 solution by titrating it against a standard solution of:
(a) Oxalic acid
(b) Ferrous Ammonium Sulphate - (Students will be required to prepare standard solutions by weighing themselves).
- K. Qualitative analysis
Determination of one anion and one cation in a given salt
Cation:
Pb2+, Cu2+ As3+, Aℓ3+, Fe3+, Mn2+, Zn2+, Ni2+, Ca2+, Sr2+, Ba2+, Mg2+, NH2+ - Anions:
- (CO3)2-, S2-, (SO3)2-, (NO2)–, (SO4)2-, Cℓ–, Br–, I–, (PO4)3-, (C2O4)2-, CH3COO– , NO3–
- (Note: Insoluble salts excluded)
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Understanding the Role of Chemistry practical file class 12
Essence of Practical Work
Class 12 Chemistry Practical Files serve as a bridge between theory and application. They are a testament to your practical understanding of chemical principles and techniques learned in the classroom.
Assessment Tool
These files are not just records; they are assessment tools. Class 12 students are evaluated not only on their experimental skills but also on their ability to articulate observations, analyze results, and draw meaningful conclusions.
Strategies for Crafting an Outstanding Chemistry practical file class 12
Organization is Key
A well-organized file is a testament to your diligence. Class 12 students structure their files logically, making it easy for examiners to follow their scientific journey.
Precision in Observations
Class 12 Chemistry Practical Files demand precision. Students pay meticulous attention to detail, ensuring accurate and reliable observations that form the backbone of their experiments.
Connect Theory and Practice
Harmony between theory and practice is vital. Class 12 students elucidate how their practical work aligns with theoretical concepts, showcasing a holistic understanding of chemistry.
Navigating Common Challenges: Tips for Success
Time Management
Practical work takes time. Class 12 students plan their experiments well, allocating sufficient time for each step, including unforeseen delays.
Thorough Revision
Preparation is key. Class 12 Chemistry Practical Files reflect a thorough understanding of experiments, prompting students to revisit theoretical concepts before diving into practical work.
In Conclusion: Master Notes as Your Guide to Success
Class 12 Chemistry Practical Files are not merely paperwork; they are a canvas for your scientific exploration. With Master Notes as your guide, you are equipped to excel in the practical dimension of chemistry, showcasing not only your experimental prowess but also your ability to articulate, analyze, and draw meaningful conclusions. Happy experimenting!
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