Which concentration measurement is use Pharmacy ?

Options

A. Mass by volume percentage
B. Mole fraction
C. Molarity
D. Molality

Answer

To answer the question "Which concentration measurement is used in Pharmacy?", we can break down the solution step by step:

### Step-by-Step Solution:

1. **Understanding Concentration Measurements**:
- Concentration measurements are used to express the amount of solute in a solution. In pharmacy, precise measurements are crucial for the formulation of medications.

2. **Common Concentration Measurements**:
- There are various ways to express concentration, including molarity, molality, mass percent, volume percent, and mass/volume percent.

3. **Focus on Mass/Volume Percentage**:
- Among these, the mass/volume percentage (m/v %) is particularly important in pharmacy. It indicates how many grams of solute are present in 100 mL of solution.

4. **Formula for Mass/Volume Percentage**:
- The formula for calculating mass/volume percentage is:
\[ \text{Mass/Volume Percentage (m/v \%)} = \left( \frac{\text{Mass of Solute (g)}}{\text{Volume of Solution (mL)}} \right) \times 100 \]
- This means if you have a solution where you dissolve a certain mass of solute in a total volume of 100 mL, you can easily calculate the percentage concentration.

5. **Application in Pharmacy**:
- In pharmacy, this measurement is used to prepare solutions for medications, ensuring that patients receive the correct dosage. For example, if a medication requires a 5% (m/v) solution, it means there are 5 grams of the active ingredient in every 100 mL of the solution.

### Final Answer:
In pharmacy, the concentration measurement commonly used is the **mass/volume percentage (m/v %)**.

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