How to Calculate Water in a 3:2 Alcohol-to-Water Mixture

When working with mixtures, understanding the proportions is key—especially when dealing with liquids like a solution containing alcohol and water. One common ratio you might encounter is alcohol to water in a 3:2 ratio. This means for every 3 parts of alcohol, there are 2 parts of water.

The Given Information

Suppose you have a total mixture containing 15 liters of alcohol, and the alcohol-to-water ratio is 3:2. Our goal is to find out how many liters of water are present.

Understanding the Context


Understanding the Ratio

The ratio 3:2 means:

  • Alcohol represents 3 parts
  • Water represents 2 parts
  • Total parts = 3 + 2 = 5 parts

Key Insights

Using Proportions to Solve

If 3 parts = 15 liters of alcohol, then:
1 part = 15 ÷ 3 = 5 liters

Since water is 2 parts:
Water = 2 × 5 = 10 liters


Summary

Final Thoughts

In a mixture with alcohol and water in a 3:2 ratio:

  • 15 liters of alcohol = 3 parts
  • Each part = 5 liters
  • Therefore, water = 2 × 5 = 10 liters

Conclusion

Understanding simple liquid ratios helps in cooking, chemistry, pharmaceuticals, and everyday household mixing. When you know the total alcohol and the ratio, calculating the corresponding water content is straightforward:
Water = (2/5) × Alcohol volume

For 15 liters of alcohol, you always get 10 liters of water in a 3:2 mixture.


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