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Percentage solution
From Wikipedia, the free encyclopedia
(Redirected from W/w)
In biology percentage solutions are often preferred to molar ones. A 1% solution would have 1 g of solute dissolved in a final volume of 100 ml of solution. This would be labeled as a weight/volume [w/v] percentage solution. For w/w, both solvent and solute would need to be weighed in the required ratios. Volume would accordingly be measured using a measuring cylinder, volumetric flask, pipette or similar. Labels should show what the percentage relationships are (w/v, w/w or v/v).
The molarity of a percentage solution (w/v) can be calculated using the molar mass of the solute used. For example, sucrose (table sugar) has a molar mass of a 342.34 g/mol. A 1% sucrose solution (100ml, w/v), therefore, is 0.029 molar, or 29 mM.
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| Solution | Ideal solution • Aqueous solution • Solid solution • Flory-Huggins • Mixture • Suspension (chemistry) • Colloid • Phase diagram • Eutectic point • Alloy |
| Concentration | Saturation (chemistry) • Supersaturation • Molar solution • Percentage solution |
| Solubility | Solubility equilibrium • Total dissolved solids • Solvation • Solvation shell • Enthalpy change of solution • Lattice energy • Raoult's law • Henry's law • Solubility table (data) • Solubility chart |
| Solvent | (category) • Acid dissociation constant • Protic solvent • Inorganic nonaqueous solvent • Solvation • List of boiling and freezing information of solvents Partition coefficient • Polarity • Hydrophobe • Hydrophile • Lipophilic • Amphiphile |