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How can you standardized soda ash
Accepted Answer
Soda ash (sodium carbonate, Na2CO3) can be standardized using a primary standard, such as potassium hydrogen phthalate (KHP). Here's a basic procedure:
1. Prepare a standard solution of KHP: Dissolve a precisely weighed amount of KHP in distilled water to create a solution of known concentration.
2. Titrate the soda ash solution: Use the standardized KHP solution to titrate a known volume of the soda ash solution. The reaction between KHP and Na2CO3 is:
KHP + Na2CO3 → KNaCO3 + H2O + CO2
3. Determine the concentration: The volume of KHP solution required to reach the endpoint (usually indicated by a color change) can be used to calculate the concentration of the soda ash solution.
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