What is the specific gravity of distilled water at 4°C?

• A. 0.75
• B. 2.00
• C. 0.50
• D. 1.00

Answer: (D)

Verified step by step guidance

1. Understand that specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance, typically water at 4°C for liquids.
2. Recall the formula for specific gravity: \(SG = \frac{\text{density of substance}}{\text{density of reference substance}}\).
3. Note that distilled water at 4°C is the reference substance itself, so its density compared to itself is the ratio of the same values.
4. Since the density of distilled water at 4°C is approximately 1.00 g/cm³, the specific gravity of distilled water at this temperature is \(SG = \frac{1.00}{1.00}\).
5. Conclude that the specific gravity of distilled water at 4°C is 1.00, because it is the reference standard.