04_Titrimetry-page4

04_Titrimetry-page4 - mmolesB = mmolesA R = mlA MA R More...

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Unformatted text preview: mmolesB = mmolesA R = mlA MA R More commonly, we’ll be interested it the percent of a material in a sample so: mgB = mlA MA R FWB mgB % B = 100 mg mlA MA R FW Na2CO3 Sample weight % Na CO = 2 3 sample = mlA MA R FWB 100 mgsample = 22.12 = 0.1200 = 0.5 ( 1 carbonate / 2 H+ ) = 105.99 g/mol = 0.5000 g (22.12 ml)(0.1200M)(.5)(105.99g/mol)(100) 500.0 mgsample = 28.13 % (19.80 ml)(0.0500M)(2)(19.00g/mol)(100) 92.5 mg ...
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