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12 April, 09:04

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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  1. 12 April, 09:16
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    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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