A scientist mixes 40 mL of a 10% saline solution with 60 mL of a 20% saline solution. What is the concentration of the resulting solution? - Coaching Toolbox
Title: How to Calculate the Concentration of a Mixed Saline Solution: A Scientific Approach
Title: How to Calculate the Concentration of a Mixed Saline Solution: A Scientific Approach
When mixing saline solutions of different concentrations, understanding how to compute the resulting concentration is essential in laboratory, medical, and educational settings. A common challenge is determining the final concentration when combining measured volumes of solutions with known salt (solute) percentages. In this article, we explore a precise method using a practical example: mixing 40 mL of a 10% saline solution with 60 mL of a 20% saline solution. The result? A clearer understanding of concentration calculations that combines chemistry and arithmetic.
Understanding the Context
Step-by-Step Breakdown: How to Find the Final Concentration
To find the concentration of the mixed solution, we use the principle of mass balance—the idea that the total amount of solute before mixing equals the total amount after mixing, regardless of volume or concentration.
Given:
- Volume of 10% saline solution: 40 mL
- Concentration of 10% solution: 10% = 0.10
- Volume of 20% saline solution: 60 mL
- Concentration of 20% solution: 20% = 0.20
Image Gallery
Key Insights
Step 1: Calculate the amount of salt in each solution
For a solution, concentration (%) = (mass of solute / mass of solution) × 100, but we can also work directly with volumes and concentrations for a straightforward calculation.
Salt mass from first solution:
(10 / 100) × 40 mL = 0.10 × 40 = 4 grams of salt
Salt mass from second solution:
(20 / 100) × 60 mL = 0.20 × 60 = 12 grams of salt
🔗 Related Articles You Might Like:
📰 What This M3 GTR Actually Does That Shock Car Enthusiasts 📰 This BMW M3 GTR Is Not Built for Speed—It’s Built to Destroy 📰 BMW M2 Slips Off List Without Fair Price Tag—You Won’t Believe This Hidden Deal 📰 Is Your Windows 11 Acting Weird The Latest Update Holds The Shocking Solution 956747 📰 Centerpoint Energy Login 5656226 📰 Define Missive 8948929 📰 Dare To Explore The Hidden Symbolism Power Of The Bagua Map Awaits You 2851326 📰 The Tax Table Revealed How To Cut Your Tax Bill By Over 40 3286556 📰 Assassin On Roblox 2961814 📰 Channel 3000 Says Its Not Just Rainthis Weather Threatens Your Future 4432882 📰 Bankofamerica Employee Resources 1680255 📰 Stop Wasting Moneydiscover The Top Saas Services Killers In 2024 5915910 📰 Gonjiam 5036639 📰 Is Telco Stock Overdue Discover The Hidden Surge Thats Rewriting The Future 4078635 📰 Akila Daily Newspaper Shocking Exclusive Breaks That Every Indian Must Read This Morning 4252511 📰 Ethos Apartments 5142418 📰 Free Spiderman Games 1399849 📰 Uncover The Most Addictive Spongebob Games That Are Taking Over 2024 1227022Final Thoughts
Step 2: Add the total salt and total volume
Total salt = 4 grams + 12 grams = 16 grams
Total volume = 40 mL + 60 mL = 100 mL
Step 3: Calculate the final concentration
Concentration = (Total salt mass / Total volume) × 100
= (16 g / 100 mL) × 100 = 16%
Final Answer:
The resulting solution has a 16% saline concentration.
Why This Method Matters
This calculation reflects the law of conservation of mass applied in solution chemistry. It helps scientists, medical professionals, and students accurately prepare and verify saline solutions for experiments, medical treatments, or educational demonstrations. Understanding concentration mixing is foundational in fields such as biology, pharmacy, and chemical engineering.
