An empty 10 ml volumetric flask weighs 10.2634 g. when filled to the mark with distilled water and weighed again in the air at 20 oc, the mass is 20.2144 g. what is the true volume of the flask at 20 oc?

Question

Chemistry

Brie

21 June, 18:08

An empty 10 ml volumetric flask weighs 10.2634 g. when filled to the mark with distilled water and weighed again in the air at 20 oc, the mass is 20.2144 g. what is the true volume of the flask at 20 oc?

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Gustavo Franco · Answer 1

Answer is: the true volume of the flask is 10.2163 grams.

d (H₂O) = 0.9981 g/mL; density of water at 20°C.

V (H₂O) = 10 mL; volume of water.

m (H₂O) = d (H₂O) · V (H₂O).

m (H₂O) = 0.9981 g/mL · 10 mL.

m (H₂O) = 9.9981 g.

m (empty flask) = m (filled flask) - m (H₂O).

m (empty flask) = 20.2144 g - 9.9981 g.

m (empty flask) = 10.2163 g.