Home
Back
Molarity Equation:
| From: | To: |
Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution. It's a fundamental concept in physiology and biochemistry for describing the concentration of substances in biological fluids.
The calculator uses the molarity equation:
Where:
Explanation: The equation calculates how many moles of solute are present in each liter of solution, which is crucial for understanding solution concentrations in physiological systems.
Details: Molarity is essential for preparing physiological solutions, understanding osmotic pressures, calculating drug dosages, and interpreting laboratory results in clinical settings.
Tips: Enter mass in grams, molecular weight in g/mol, and volume in liters. All values must be positive numbers. The calculator will compute the molarity in mol/L.
Q1: What's the difference between molarity and molality?
A: Molarity is moles per liter of solution, while molality is moles per kilogram of solvent. Molarity is temperature-dependent (volume changes with temperature), while molality is not.
Q2: Why is molarity important in physiology?
A: Physiological processes depend on molecular concentrations. Molarity helps quantify concentrations of ions, molecules, and drugs in body fluids like blood and urine.
Q3: How do I find the molecular weight of a compound?
A: Molecular weights can be found in chemical databases, on reagent bottles, or calculated by summing the atomic weights of all atoms in the molecule.
Q4: What are typical molarity ranges in physiological solutions?
A: Blood glucose is about 0.005 M, NaCl in saline is about 0.15 M, and plasma sodium is about 0.14 M.
Q5: Can I use this for very dilute or concentrated solutions?
A: While the calculation works mathematically, very concentrated solutions may show non-ideal behavior, and very dilute solutions may be better expressed in mM or μM.