What is the Molarity and uncertainty of the molarity of a BaSO4 solution that is

Question

What is the Molarity and uncertainty of the molarity of a BaSO4 solution that is prepared by dissolving 4.5683 (+or- 0.0001) grams of BaSO4 in distiller water? The dissolved salt is quantitatively transferred to a 500.00 ml volumetric flask and filled to the mark. What is the Molarity and uncertainty of the molarity of a BaSO4 solution that is prepared by dissolving 4.5683 (+or- 0.0001) grams of BaSO4 in distiller water? The dissolved salt is quantitatively transferred to a 500.00 ml volumetric flask and filled to the mark.

Explanation / Answer

What is the Molarity and uncertainty of the molarity of a BaSO4 solution that is prepared by dissolving 4.5683 (+or- 0.0001) grams of BaSO4 in distiller water? The dissolved salt is quantitatively transferred to a 500.00 ml volumetric flask and filled to the mark.

solution

Molarity = mass / mol wt X volume (L)

Mol wt of BaSO4 = 233.389

Molarity = 4.5683 / 233.389 X 0.5 = 0.03914 Molar

Now uncetainity in mass = 0.0001

So % uncertainity = (0.0001 /  4.5683 ) X 100 = 0.00218

so % unceratinity in molarity = 0.00218

So absolute uncertainity = 0.00218 X 4.5683 = 0.0000853 M

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