A 150-ml sample of water containing Ca2+ and Mg2+ was treated with sodium hydroxide solution to raise the pH to 13. It was then titrated with 18.48 ml of 0.0045 M EDTA solution. The molar mass of CaCO3 is 100.09. Calculate for the ppm CaCO3 of the water sample. Express your answer in 2 decimal places.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.