The Knowledge Hub
Practical troubleshooting guides for working analytical chemists — HPLC, UHPLC, LC-MS, GC, and reagent prep. Each guide is diagnostic-first and linked to the tool that resolves it.
Sulfuric Acid (H2SO4): Density, Molar Mass and Concentration Table
Density of H2SO4 at every concentration from 10% to 98%, with molarity and normality. Molar mass 98.079 g/mol, plus dilution volumes and…
Molar Mass of NaOH (Sodium Hydroxide): Value, Calculation and Lab Use
The molar mass of NaOH is 39.997 g/mol (40.00 g/mol in practice). See the calculation, gram-to-mole conversions, and how much to weigh…
Ethanol
Molecular Formula: C2H6O, C2H5OH CAS: 64-17-5 Synonyms: Ethanol, Alcohol, Ethyl, Grain Alcohol Molecular Weight: 46.07 g/mol Monoisotopic Mass: 46.041864811 Da Exact Mass: 46.041864811 Da Solubility:…
Potassium tert-butoxide
Description: Potassium tert-Butoxide, a tetrameric cubane-like cluster, is used as a non-nucleophilic and strong base in organic chemistry. Details References:
Preparation of Ammonium Sulfate Saturated Solution
Introduction Ammonium Sulfate is commonly used for reagent for protein precipitation (ammonium sulfate precipitation) and fractionation as it enhances hydrophobic interactions. Ammonium…
Molarity of 50% (w/w) Sodium Hydroxide (NaOH)
Overview A 50% solution of sodium hydroxide is a clear and colorless liquid. It is available is in premade format from a…
Molarity of 37% (w/w) Hydrochloric Acid (HCl)
Overview Preparation Step 1: Calculate the volume of 100 grams of Hydrochloric acid. Formula: Density = weight / volume or Volume = …
Molecular and Equivalent Weights of Common Compounds
Chemical Name Molecular Formula Molecular Weight (g/mol) Equivalent Weight (g/equiv) Acetic Acid CH3COOH 60.05 60.05 Ammonium Sulfate (NH4)2SO4 132.14 132.14 Calcium Carbonate…
Preparation of 0.25 M Sodium Hydroxide (NaOH) Solution
Overview Calculation procedure Parameter Value Required volume 1000 mL Molecular weight of NaOH 39.997 g/mol Concentration of 0.25 M Sodium Hydroxide 1.00%…
Preparation of 2X YT Media
Overview Reagents Required Equipment Preparation Step 1: To prepare 1000 ml of 2 X YT medium, weigh out 16 g tryptone, 10…