Estimation of Bicarbonate alkalinity of Investigated pond (Khutabandh, Dumka Jharkhand)

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Requirements-

• Sample water
• Methyl orange
• Pipette 
• N/50 H₂SO₄
• Flask
• Measuring cylinder
• Beaker

Principle-

Bicarbonate alkalinity is the important chemical parameter. Usually produced in water due to acid-base buffer system. It is stable compound generally influence the acidic or alkaline medium of water.

CO₂ + H₂O -------- H₂CO₃---------- H⁺ + HCO₃^- ---------- H⁺ + CO₃^2-
 

Procedure-

 100ml of water sample was taken in a conical flask and few drops of methyl orange indicator was added. Deep orange color appeared. The sample was titrated against N/50 H₂SO₄ till a permanent sunset color appeared.

Calculation-

 Bicarbonate alkalinity in water sample = Volume of N/50 H₂SO₄ used × 10

                                                         = 18.6ml × 10

                                                         = 186ppm

Precaution-

• Handling of water sample during collection to avoid bubbling, jerk etc.
• Titration of the sample will be made immediately on spot.