A laboratory must prepare 200.0 g of a sulfuric acid solution that is 25.0 % H SO by…

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Problem

A laboratory must prepare 200.0 g of a sulfuric acid solution that is 25.0 % H2_2SO4_4 by mass using stock solutions that are 5.0 %, 20.0 %, and 35.0 % H2_2SO4_4 by mass. Safety guidelines require that the mass of the 5.0 % solution be exactly one-third of the mass of the 35.0 % solution. What mass of the 35.0 % stock solution should be used? (a) 66.7 g66.7\,\text{g} (b) 1.00×102 g1.00\times 10^{2}\,\text{g} (c) 1.12×102 g1.12\times 10^{2}\,\text{g} (d) 150 g150\,\text{g}

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