#### -141. A tank contains 120 liters of a solution that is 25% salt. If 20 liters of pure water are added, what is the new concentration of salt in the solution?

Fri, 08 May 2026 04:17:54 +0000

### The Quiet Shift in Water-Management Engineering: What’s the New Salt Concentration? In a growing number of conversations around everyday household systems, a simple yet revealing question surfaces: how does diluting a salt solution change its composition? Many U.S. users—especially those managing irrigation, pool chemistry, or industrial processes—are exploring how mixing pure water affects concentration levels. One practical example draws growing interest: a tank containing 120 liters of a 25% salt solution receives an addition of 20 liters of pure water. This shift raises natural curiosity: what’s the new salt concentration, and what does it mean for system efficiency and long-term usage? Understanding this scenario is increasingly relevant as Americans seek effective, sustainable water management solutions. Small changes in solution strength impact filtration systems, chemical balance, and operational costs—making accurate concentration calculations valuable knowledge. ### The Growing Relevance of Saltwater Systems in Daily Life