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 100 mL pycnometer is found to weigh 143 g when empty, 243.93 g when filled with water, and 286.3206 g when filled with nitric acid . Calculate the specific gravity of nitric acid .
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lb equals 1.42 kg
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Weight of the empty pycnometer = 143 g.
Weight of the pycnometer containing water = 243.93 g.
Therefore, the weight water = 243.93 - 143 = 100.93 g.
Weight of the pycnometer containing nitric acid = 286.3206 g.
Therefore, the weight of the nitric acid alone = 286.3206 - 143 = 143.3206 g.
The specific gravity of nitric acid will be the ratio of the weight of nitric acid and the weight of water. Therefore, the SG is 143.3206 / 100.93 = 1.42
Thefore, the answer is 1.42 (no unit).