SG using pycnometer
2. Density & Specific Gravity 2.1) Specific Gravity 2.1.2) SG - Pycnometer
2.1.2.1) SG using pycnometer Easy 1
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A 50 mL pycnometer is found to weigh 121 g when empty, 174.5 g when filled with water, and 169.685 g when filled with olive oil . Calculate the specific gravity of olive oil .
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lb equals 0.91 kg
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Weight of the empty pycnometer = 121 g.
Weight of the pycnometer containing water = 174.5 g.
Therefore, the weight water = 174.5 - 121 = 53.5 g.
Weight of the pycnometer containing olive oil = 169.685 g.
Therefore, the weight of the olive oil alone = 169.685 - 121 = 48.685 g.
The specific gravity of olive oil will be the ratio of the weight of olive oil and the weight of water. Therefore, the SG is 48.685 / 53.5 = 0.91
Thefore, the answer is 0.91 (no unit).