Specific Gravity Formula:
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Definition: Specific Gravity at 30°C is defined as the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material (usually water) at 30°C.
Purpose: It helps in determining the purity and concentration of liquids, particularly in petroleum and chemical industries.
The calculator uses the formula:
Where:
Explanation: The formula compares the weight of the oil sample to the weight of an equal volume of water at the same temperature.
Details: Specific gravity measurements are crucial for quality control, product identification, and determining the concentration of solutions in various industries.
Tips:
Q1: Why is temperature specified as 30°C?
A: Many industries standardize measurements at 30°C for consistency, though some may use 15°C or 20°C depending on the application.
Q2: What if I get a negative result?
A: Check your measurements - bottle with oil weight should be greater than empty bottle weight.
Q3: How accurate is this method?
A: When performed carefully, this method can provide specific gravity measurements accurate to ±0.001.
Q4: Can I use this for any liquid?
A: Yes, this method works for any liquid that doesn't react with the bottle material.
Q5: What's the typical range for specific gravity?
A: Most oils range from 0.8 to 0.95, while water is exactly 1.000 at 30°C.