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Estimation of Calcium Calculator

This calculator helps estimate the percentage of calcium in a sample using titration with potassium permanganate (KMnO₄). It is useful for analytical chemistry, especially in agricultural, food, and pharmaceutical industries. By entering values such as the volume and normality of KMnO₄ and the sample weight, the calculator provides an accurate calcium percentage based on a standard titration formula.

Estimation of Calcium Calculator

Input Fields
Volume of potassium permanganate used in titration
Concentration of KMnO₄ solution
Weight of the feed sample
If enabled, the result will update automatically when you change any value.

Estimation of Calcium Formula

Formula
$$\text{Calcium \%} = \frac{V \times N \times 250 \times 100 \times 20}{W \times 25 \times 1000}$$

Where:

  • $$V$$ = Volume of KMnO₄ (in mL)
  • $$N$$ = Normality of KMnO₄
  • $$W$$ = Sample weight (in grams)


This method is based on redox titration using KMnO₄ as the titrant. Calcium is estimated by complexometric analysis, often after precipitation and dissolution steps. The factor 250 accounts for the dilution volume, while 100 and 20 are multiplication constants for unit conversions and titration conditions. The denominator contains factors from titration volume (25 mL) and standard molar conversions (1000). Typical use cases include quality control in food processing, pharmaceutical product testing, and water hardness analysis.

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Balancing Redox Reactions

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