A 10-ml transfer pipet and a 200-ml volumetric flask (TC) are used to make 0.100 M and 0.0050 M solutions from a stock solution of 2.000(plus or minus) 0.005 M. Calculate the percent relative error for the three solutions if perfect technique is used. (See Garland Experiments in Physical Chemistry, 10th ed. p. 639-642) Report the two new molaritites

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Asked Sep 11, 2019
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A 10-ml transfer pipet and a 200-ml volumetric flask (TC) are used to make 0.100 M and 0.0050 M solutions from a stock solution of 2.000(plus or minus) 0.005 M. Calculate the percent relative error for the three solutions if perfect technique is used. (See Garland Experiments in Physical Chemistry, 10th ed. p. 639-642) Report the two new molaritites

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Step 1

The percent relative error for the three solutions when perfect technique is used can be calculated as follows,

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Percent erTor Absolute error x100% True value 0.005100%= 0.25% 2.0 Percent error 0.25%

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Step 2

New molarity of 0.100 M sol...

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Absolute eTorx100% Percent error True value 0.25 x 0.100 100 Absolute eITor of the solution 0.00025 M Therefore, new molarity 0.100 t0.00025 M

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