1. What is Weight per Volume %?

Weight per volume percentage (% w/v) is a common way to express the concentration of a solution. It represents the mass of solute (in grams) per 100 mL of solution.

2. How Does the Calculator Work?

The calculator uses the % w/v formula:

Where:

• \( Weight \) — Mass of solute in grams (g)
• \( Volume \) — Volume of solution in milliliters (mL)

Explanation: This calculation determines what percentage of the total solution volume is made up by the solute's mass.

3. Importance of % w/v Calculation

Details: % w/v is widely used in chemistry, pharmacy, and medical fields for preparing solutions with specific concentrations, particularly when working with solid solutes dissolved in liquid solvents.

4. Using the Calculator

Tips: Enter the weight in grams and volume in milliliters. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between % w/v and % v/v?
A: % w/v (weight/volume) uses mass of solute, while % v/v (volume/volume) uses volume of solute. Use w/v for solid solutes and v/v for liquid solutes.

Q2: Can % w/v exceed 100%?
A: No, % w/v cannot exceed 100% as it would mean the solute mass exceeds the total solution volume, which is physically impossible.

Q3: When is % w/v commonly used?
A: It's frequently used in pharmaceutical preparations, laboratory solutions, and medical formulations where precise concentration measurements are required.

Q4: How does temperature affect % w/v calculations?
A: Since volume can change with temperature while mass remains constant, % w/v values may vary slightly with temperature changes, though this is often negligible for most applications.

Q5: Can this calculator be used for very dilute solutions?
A: Yes, the calculator works for any concentration range, though very small values may be better expressed in parts per million (ppm) for readability.