A chemist has a 20% saline solution. How much pure salt must be added to 100 mL of this solution to make a 40% saline solution?

Tue, 05 May 2026 07:30:49 +0000

**A chemist has a 20% saline solution. How much pure salt must be added to 100 mL of this solution to make a 40% saline solution?** The question “How much pure salt must be added to 100 mL of a 20% saline solution to create a 40% solution?” is gaining steady attention online—a reflection of growing consumer interest in chemistry, home health, and personal wellness. With rising demand for DIY science projects, home remedy experimentation, and transparency around medical-grade solutions, this problem highlights both the precision of chemistry and its real-world relevance. Understanding how salt concentration affects solution strength helps users make informed decisions, whether for caregiving, supplement use, or medical preparations—all without requiring medical expertise. Understanding the chemistry is key to answering this question clearly. A 20% saline solution means 20 grams of salt per 100 milliliters of water, equivalent to 20 grams of dissolved salt in a total volume of 100 mL. To increase the concentration to 40%, pure salt must be added—measured in grams—without adding extra water. The chemist’s goal is to elevate the salt percentage through addition while preserving the original volume as the baseline. **How A chemist has a 20% saline solution. How much pure salt must be added to 100 mL of this solution to make a 40% saline solution? Actually Works**