1. What is Alligation in Chemistry?

Alligation is a method used to calculate the ratio in which two solutions of different concentrations should be mixed to obtain a desired intermediate concentration. It's commonly used in pharmacy and chemistry for solution preparation.

2. How Does the Calculator Work?

The calculator uses the alligation formula:

Where:

• \( C_{\text{high}} \) — Higher concentration solution (%)
• \( C_{\text{low}} \) — Lower concentration solution (%)
• \( C \) — Target concentration (%)

Explanation: The result shows the parts of higher concentration solution needed per part of lower concentration solution to achieve the target concentration.

3. Importance of Alligation

Details: Alligation is crucial for preparing precise concentrations in laboratory and pharmaceutical settings, ensuring accurate dilutions and mixtures.

4. Using the Calculator

Tips: Enter concentrations in percentage (%). The target concentration must be between the high and low concentrations. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if my target concentration equals one of the input concentrations?
A: The ratio will be either 0 (if target equals high concentration) or undefined (if target equals low concentration).

Q2: Can I use this for non-percentage concentrations?
A: Yes, as long as all concentrations use the same units (mg/mL, Molarity, etc.), the ratio will be valid.

Q3: How do I apply the ratio in practice?
A: For example, a ratio of 2:1 means 2 parts high concentration solution mixed with 1 part low concentration solution.

Q4: What if I get a negative ratio?
A: This indicates your target concentration is outside the range between your high and low concentrations.

Q5: Can this be used for solid mixtures?
A: Yes, alligation can be adapted for mixing solids by weight when preparing mixtures of known composition.