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23 April, 22:34

30. how many grams of boric acid, b (oh) 3 (fm 61.83), should be used to make 2.00 l of 0.050 0 m solution? what kind of fl ask is used to prepare this solution?

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  1. 23 April, 22:38
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    Mass = 6.183 g

    Solution:

    Step 1: Calculate number of moles of Boric acid using following formula,

    Molarity = Moles : Volume

    Solving for Moles,

    Moles = Molarity * Volume

    Putting Values,

    Moles = 0.05 mol. L⁻¹ * 2.0 L

    Moles = 0.1 mol

    Step 2: Calculate Mass of Boric Acid using following formula,

    Moles = Mass : M. mass

    Solving for Mass,

    Mass = Moles * M. mass

    Putting values,

    Mass = 0.1 mol * 61.83 g. mol⁻¹

    Mass = 6.183 g

    Flask used to prepare this solution is called as Volumetric flask. Take 2 L volumetric flask, add 6.183 g of Boric acid and fill it to the mark with distilled water.
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