How much 95 percent alcohol is required to prepare 5 L of 70 alcohol?

Here's how to calculate the amount of 95% alcohol needed:

Understanding the Problem:

* You want to create a 5 L solution of 70% alcohol.

* This means 70% of the 5 L solution will be pure alcohol.

Calculations:

1. Calculate the total volume of pure alcohol needed:

* 5 L * 0.70 = 3.5 L of pure alcohol

2. Calculate the volume of 95% alcohol needed:

* 3.5 L (pure alcohol) / 0.95 (concentration of 95% alcohol) = 3.68 L

Answer: You will need approximately 3.68 L of 95% alcohol to prepare 5 L of 70% alcohol.

Important Note: Always handle alcohol solutions with care and follow proper safety guidelines.