Concentration is the abundance of constituent divided by total mixture volume. Most frequently refers to solutes and solvents in solutions. Concentration can be described qualitatively using adjectives like "dilute"
Concentration measures solute amount dissolved in solvent. Solute can exist in different phases than just solid
pH measures acidity or basicity of solutions on scale 0-14. Neutral pH is 7, acidic below 7, basic above 7. pH specifically refers to hydrogen ion concentration in aqueous solutions
PPM (parts per million) measures concentration in dilute solutions. 1 ppm equals 1 mg of substance per liter of water. Molarity indicates moles of molecules per liter of solution. One mole contains 6.0221409×10²³ molecules
Solution concentration is calculated using C = m/V formula. Concentration can be expressed as parts per million (ppm) for small amounts
Dilution is making a concentrated solution less concentrated. The formal formula for dilution is C1V1 = C2V2. Molarity (M) indicates moles of substance per liter