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Percent Weight by Volume Formula:
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Percent weight by volume (% 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. This measurement is widely used in chemistry, pharmacy, and various scientific fields.
The calculator uses the percent weight by volume formula:
Where:
Explanation: The formula calculates what percentage of the total solution volume is made up by the solute's weight.
Details: % w/v is crucial for preparing accurate solutions in laboratories, pharmaceutical preparations, medical treatments, and various industrial processes where precise concentrations are required.
Tips: Enter the weight of solute in grams and the volume of solution in milliliters. Both values must be positive numbers. The calculator will compute the percentage weight by volume.
Q1: What's the difference between % w/v and % v/v?
A: % w/v (weight/volume) measures mass per volume, while % v/v (volume/volume) measures volume per volume. They are used for different types of solutions and solutes.
Q2: When is % w/v typically used?
A: % w/v is commonly used when the solute is a solid and the solvent is a liquid, particularly in pharmaceutical preparations and laboratory solutions.
Q3: Can % w/v exceed 100%?
A: No, % w/v cannot exceed 100% as it would imply that the mass of solute exceeds the total volume of solution, which is physically impossible.
Q4: How does temperature affect % w/v calculations?
A: Temperature can affect volume measurements due to thermal expansion. For precise work, measurements should be made at standard temperature or corrections applied.
Q5: Is % w/v the same as g/100mL?
A: Yes, % w/v is equivalent to grams of solute per 100 mL of solution. A 1% w/v solution contains 1g of solute in 100mL of solution.