Category: Chemistry Lab

Solubility product

After reading this reader will be able to: Define the term solubility product constant Find out the value of solubility product constant after knowing the value of solubility of corresponding compounds Calculate the solubility of a compound from its solubility product constant Source: Internet ( By searching google) Click Here For This PPT

Semi-micro analysis

Semi-micro System: Semi- micro analysis is the analysis of substances with a mass in the micro-scale. For semi-micro analytical method, 0.1-0.5 g sample is required for analysis. Volume of the solution is 1.00 mL. Micro-system: Incase of micro analytical method, 0.001-0.01 g sample is required for analysis. Volume of the solution is nearly less than 1.00 mL. Advantages: Semi-micro analysis: Very normal and less expensive Easy  handling Waste production is…

Synthesis of tetraamminecopper(II) sulphate

Preparation of  the complex compound [Cu(NH3)4]SO4, according to the following procedure: Dissolve the supplied sample in 3 mL distilled water, and then add 5 mL concentrate NH3. Precipitate the tetraammine complex by adding drop-wise 5 mL of rectified spirit. After keeping the mixture in cold for an hour, filter the precipitate on a buckner funnel, wash it with 5 mL of 1:1 alcohol-ammonia mixture and finally with 5 mL alcohol…

Estimation of the amount of copper present in the supplied sample

The amount of copper present in the supplied sample can be determined by the following way: Step 1. Prepare a standard solution of potassium dichromate and standardize the supplied thiosulphate solution in the usual manner. Step 2. Dilute the supplied sample to 250 mL in a volumetric flask and shake well (B). Take 25 mL of the previously diluted solution (B) with a pipette and deliver into a 250 mL…

Estimation of the amount of iron present in the supplied sample

The amount of iron present in the supplied sample can be estimated according to the following procedure: Step 1. Prepare approximately 0.0167 M solution of K2Cr2O7 . Step 2. Dilute the supplied sample to 250 mL in a volumetric flask and shake well (A). Take 25.00 mL of the diluted sample (A) with a pipette into a 500 mL conical flask, add 5 mL of concentrate HCl to the sample…

Separation of Copper and Estimation of Nickel Gravimetrically as Nickel dimethylglyoximate

Estimation of Ni from the mixture of Ni2+ and Cu2+ solution Procedure Pipette 25 mL given solution quantitatively into a 200 or 250 mL beaker. Acidify the solution with 1-2 mL of conc. HCl, warm the solution and pass H2S carefully to precipitate copper sulfide (black ppt.) completely. Remove H2S by boiling the solution gently (test with lead acetate paper). Cool the solution to 70-800C. Add 30-35 mL of dimethylglyoxime(dmg)…

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