I'll create a professional osmolarity calculator website with multiple calculation modes and a clean, modern interface.

I've created a comprehensive Osmolarity Calculator Pro website with the following professional features:

Key Features:

1. Three Calculation Modes:

   • Manual Calculation: Single solute with custom inputs
   • Multiple Solutes: Calculate total osmolarity for complex solutions
   • Common Solutions: Pre-calculated values for medical IV fluids

2. Professional Interface:

   • Clean, modern design with gradient background
   • Responsive layout that works on all devices
   • Intuitive tabbed navigation
   • Professional color scheme and typography

3. Comprehensive Inputs:

   • Concentration (g/L)
   • Molecular weight (g/mol)
   • Dissociation factor (1-4)
   • Volume considerations
   • Named solutes for complex calculations

4. Results Display:

   • Osmolarity (mOsm/L)
   • Osmolality (mOsm/kg)
   • Tonicity classification (Hypotonic/Isotonic/Hypertonic)
   • Color-coded result cards

5. Educational Content:

   • Formula explanation
   • Reference values
   • Common solution database
   • Clinical context

6. Pre-loaded Solutions:

   • Normal Saline, Half-Normal Saline
   • 5% Dextrose solutions
   • Lactated Ringer's
   • Mannitol, Sodium Bicarbonate
   • And more medical solutions

The calculator is perfect for healthcare professionals, laboratory technicians, researchers, and students who need accurate osmolarity calculations for clinical or research purposes.

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