CHEMISTRY PRACTICALS
Practical Portion (32 Teaching hours)
The practical work that students do during their course is aimed at providing them learning opportunities to accomplish competency of the curriculum as well as reinforcing their learning of the theoretical subject content. This part of the curriculum focuses more on skill development than knowledge building. Students must spend lots of time for working with chemical materials. Observations and investigations can enhance student learning. Project work may consist of activities designed to demonstrate the concepts and ideas through collecting, processing, analyzing and communicating data. Students should learn to,
•collect and identify
•preserve
•dissect
•draw figure, chart, preparing models, slides etc handle the equipment, instruments and laboratory handling with experimentation
• draw conclusion
Students should perform at least 10 experiments, either listed below or designed by teacher, so that no more than three experiments come from the same categories mentioned below.
List of experiments for grade 1 2
Experiments based on recovery and preparation of salt
1. To recover blue vitriol crystals from the given mixture of copper sulphate and sodium chloride.
2. To recover CaCO3 from the mixture of CaCO3 and MgCO3 (dolomite).
3. To obtain hydrated calcium sulphate from the given marble chips.
Experiments based on volumetric analysis (Titration)
4. To prepare primary standard solution of Na2CO3 and standardize the given acid solution (HCl) by the standard solution.
5. To determine the strength of approximate N/10 NaOH solution with the help of standard decinormal solution of HCl supplied.
6. To determine the strength of bench sulphuric acid (H2SO4) with the help of standard NaOH or Na2CO3 solution and express the concentration in (i) normality (ii) molarity (iii) gm/litre (iv) percentage (Double titration).
7. To standardize the given approximate N/10 KMnO standard oxalic solution (Redox titration).
Experiments based on organic chemistry:
8. To detect foreign elements present in a given organic compounds (N, S and X).
9. To identify the functional group present in the organic compounds (-OH, -COOH, CHO, –CO–,–NH2), and –COO–)
10. To test the presence of:
a) Saturated or unsaturated fats
b) Carbohydrates
c) Proteins
d) Phenol
Experiments based on thermochemistry:
11. To determine the enthalpy of neutralization of a strong acid and strong base.
12. To determine the molar enthalpy change of ammonium chloride solution
Experiments based on chemical kinetics:
13. To study the kinetics of the reaction between sodium thiosulphate and hydrochloric acid.
14. To study the kinetics of the reaction between propanone and iodine
Experiments based on salt analysis:
15. To perform complete salt analysis to detect the acid and basic radicals present in the given inorganic salt (at least three salt samples).
Experiments based on applied and analytical Chemistry:
16. To separate the components of ink by paper chromatography and determine the Rf values.
17. To determine the contents of acetic acid in the given volume of vinegar by titrimetric analysis.
18. To prepare some common compounds: a. Potash alum b. Iodoform reagent c. Fehling's solution
19. To isolate hippuric acid from given sample of cow urine.
20. To demonstrate the pH value of unknown sample solutions.
EXPERIMENTS
EXPERIMENT NUMBER: 01
TO PREPARE THE PRIMARY STANDARD 250ML OF DECINORMAL SOLUTION OF OXALIC AXID
EXPERIMENT NUMBER: 02
TO PREPARE THE PRIMARY STANDARD 250ML OF DECINORMAL SOLUTION OF SODIUM CARBONATE
EXPERIMENT NUMBER: 03
TO STANDARDIZE THE GIVEN KMnO4 SOLUTION WITH THE HELP OFPRIMARY STANDARD OXALIC ACID SOLUTION
EXPERIMENT NUMBER: 04
TO STANDARDIZE SUPPLIED H2SO4 SOLUTION WITH THE HELP OF STANDARD Na2CO3 SOLUTION
EXPERIMENT NUMBER: 05
TO STANDARDIZE NaOH SOLUTION WITH THE HELP OF STANDARD OXALIC ACID SOLUTION
EXPERIMENT NUMBER: 06
TO STANDARDIZE SUPPLIED H2SO4 SOLUTION WITH THE HELP OF SUPPLIED NaOH AND STANDARD OXALIC ACID SOLUTION
EXPERIMENT NUMBER: 07
TO RECOVER CALCIUM CARBONATE FROM THE GIVEN MIXTURE OF CALCIUM CARBONATE AND MAGNESIUM CARBONATE (DOLOMITE)
EXPERIMENT NUMBER: 08
TO RECOVER BLUE VITROL CRYSTAL FROM THE GIVEN MIXTURE OF COPPER SULPHATE AND COMMON SALT
EXPERIMENT NUMBER: 09
TO DETERMINE THE STRENGTH OF BENCH H2SO4 WITH THE HELP OF STANDARD NaOH SOLUTION
EXPERIMENT NUMBER: 10
TO DETECT THE FOREIGN ELEMENT PRESENT IN GIVEN ORGANIC COMPOUND (SAMPLE A)
EXPERIMENT NUMBER: 11
TO DETECT THE FOREIGN ELEMENT PRESENT IN GIVEN ORGANIC COMPOUND (SAMPLE B)
More experiments will be added soon!!
