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A 50 ml sample of calcium hydroxide solution required 19.50 ml of 0.1050N HCL titration. Calculate the amount of calcium hydroxide in the 50 sample?

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MissPhiladelphia
The reaction of calcium hydroxide (Ca(OH)2) and hydrochloric acid (HCl) is:
Ca(OH)2 + 2HCl --> CaCl2 + 2H2O. So the amount of calcium hydroxide in the sample is ((19.50ml HCl)/1000) x 0.1050 mol/L 
From the balanced equation above: (1 mol Ca(OH)2 / 2 mol HCl) 
Calculating the amount of Ca(OH)2 in the 50ml sample, multiply with the molar mass: 
((19.50ml HCl)/1000) x 0.1050 mol/L x (1 mol Ca(OH)2 / 2 mol HCl) x 74.039 g/mol


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