0.75 gm of calcium carbonate is dissolved in 1 liter of distilled water. 100 ml of this standard hard water requires 25 ml of EDTA solution. 100 ml of unknown hard water requires 15 ml of EDTA solution. 100 ml of same water sample after boiling requires 10 ml of EDTA solution. Calculate Total, Permanent and Temporary hardness of water sample.

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