Principle: Ba is precipitated as barium sulfate with sulfuric acid. After the fi

Question

Principle: Ba is precipitated as barium sulfate with sulfuric acid. After the filtering with filter paper, the paper is charred off, and the precipitate is ignited to constant weight. The Ba3 content is calculated from the weight of Baso Equation: 0.2 M H,sO Resalt Sample number (Ba): Volume of the sample (pipet number 12...) Weight of the porcelain crucible Weight of the porcelain crucible + the precipitatem-2 (402 * The precipitate : m = 0.2312 Calsulation: (You must show all work to receive full credit) The concentration of Ba (g/L) in the sample is: ? The concentration of BadPOh (M = 601.9) (g/L) in the sample is: The concentration of Bacl2-2H,0 (M = 244.31 ) (gL) in the sample is:

Explanation / Answer

Concentration of Ba2+ in the sample = 0.2312/4.99 = 0.0463 g/L

Molarity = number of moles / volume

Number of moles = weight / molecular weight

601.9 * 137.327 = 82,657 g/L

Similarly , 244.31* 137.327 = 33,550 g/L

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