Tag Archives: propagation of error

Analysis of Basic Copper Carbonates

The %w/w Cu in a synthetic basic copper carbonate may be found by reducing and isolating the copper as Cu metal. To calculate the %w/w Cu we use the following formula The following is typical data test-tube: 45.6615 g test-tube … Continue reading

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In determining the concentration of HCl by titrating against the primary weak base TRIS, the molarity of HCL is calculated using the following equation where GFW is the gram formula weight of TRIS, which is 121.136 g/mol. (a) Calculate the … Continue reading

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Uncertainity in Dispensing a Reagent

Concentrated HCl is 37.2% w/w HCl (±0.5% w/w) and has a density of 1.19 g/mL (±0.01 g/mL).  Suppose that you need to dispense 0.0500 mol of HCl with an uncertainty of no more than ±2% (that is, an uncertainty of … Continue reading

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Propagation of Error in Preparing Solutions

Suppose  you have a bottle of 53.4% w/w NaOH (the density of which is 1.52 g/mL) from which you are to prepare a 1.000-L solution of 0.534 M NaOH.  Two obvious ways to prepare the solution are: (1) weigh out an … Continue reading

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