Chemistry

Some general chemistry related tables.

Density tables

Electron configuration of the elements
Ethanol-Water Mixtures
heated baths
Mohs hardness scale
stem correction for mercury therometers

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Acid Base Indicator

Source: Merck tables for the laboratory How useful was this post? Click on a star to rate it! Submit Rating Average rating / 5. Vote count: Post Views: 23

Concentration

Chemical concentration ratios and their conversion 1 Molar concentration  The molar concentration of a substance B in a solution of the quotient of the number of moles of substance B and the volume of the solution Lg The corresponding SI unit is 1 mol / m³. Furthermore, mol/l,  mol/dm ³, mmol/l, mol/ml, kmol/m³ permitted. A solution with the …

Concentration of commercially available acids and bases

Concentration of commercially available acids and bases Product Weight percent Density  at 20 ° C. Concentration (mol / l; rounded) Formic acid 98-100 1.22 56 Hydrobromic 40 1.38 7 Acetic acid 96 1.06 17 Acetic acid 99-100 1.06 18 Acetic acid, diluted DAB9 30 1.04 5 Hydrofluoric acid 48 1.16 28 Hydrofluoric acid 40 1.13 23 …

Density tables

Density of dry air How useful was this post? Click on a star to rate it! Submit Rating Average rating / 5. Vote count: Post Views: 288

Electrochemical series of some non-metals

Electrochemical series of some non-metals in basic solution ε ° under standard conditions (25 ° C, 1bar) measured against the standard hydrogen electrode. Red → Ox + e ε° (Volt) Red → Ox + e ε° (Volt) Te2- → Te + 2e -1,14 2I– → I2 + 2e +0,54 Se2- → Se + 2e -0,92 …

Electron configuration of the elements

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Elutrope series

Overview of the Elutrope series Solvent n-heptane Polarization index by Snyder (1) Formula Molar mass g / mol Refractive index n D20 – C7H16 100.21 1,388 boiling point ° C Vapor Pressure mbar (20 ° C) Dynamic Viscosity mPa * s 22 ° C 40 ° C 98.4 48 0.40 0.33 Surface tension against air or …

Heated baths

The temperatures indicated refer to the appropriate  Scope for the corresponding medium. fluids t in ° C fluids t in ° C Water to 95 Wood’s alloy 60-250 NaNO3 (aq, saturated cold) 150 Rose-alloy 95-250 CaCl2 (aq, cold saturated) 180 Lot-metal 200-350 Paraffin oils 150 KNO 3 from 310 Polyglycols 200 NaNO3 from 320 Silicone oils 350 MgCl2 …

Making dilute solutions

To prepare the solution, the specified output quantity is dissolved with stirring in a liter of water. For the preparation of concentrated solutions of a multiple of the amount given in a first approximation may be used. Example: To produce a 6 molar nitric acid, you can use three times the amount for the two …

Mohs hardness scale

grad of hardness mineral formula 1 Talk Mg3[(OH)2/Si4O10] 2 Gips CaSO4*2H2O 3 Kalkspat CaCO3 4 Flußspat CaF2 5 Apatit Ca5[(F,Cl,OH)/(PO4)2] 6 Feldspat KAlSi3O8 7 Quarz SiO2 8 Topas Al2[F2/SiO4] 9 Korund Al2O3 10 Diamant C How useful was this post? Click on a star to rate it! Submit Rating Average rating / 5. Vote count: …

Preparation of diluted solutions

To prepare the solution, the specified output quantity is dissolved with stirring in a liter of water. For the preparation of concentrated solutions of a multiple of the amount given in a first approximation may be used. Example: To produce a 6 molar nitric acid, you can use three times the amount for the two molar solution, ie three times 140 ml of a 65% nitric acid. solution to prepared | output quantity for 1 liter diluted solution Mass % Density (g/ml) mol/l …

Refrigerant

Aqueous salt solutions (100 g H 2 O + x g salt) Salt x t in ° C Salt x t in ° C CH3COONa * H2O 85 -4.7 NH4Cl 30 -5.0 NaNO3 75 -5.3 Na2S2O 3 * 5 H2O. 110 -8.0 KCl 25 -12.0 NH4Cl + NaNO3 30 + 30 -12.0 CaCl2 * 6H2O 250 -12.5 NH4NO3 100 …

Series of the elements (acidic solution)

The electrochemical series of the elements in acid solution ε ° under standard conditions (25 ° C, 1bar) measured against the standard hydrogen electrode. Red → Ox + e ε° (Volt) Red → Ox + e ε° (Volt) Li → Li+ + e -3,045 Fe → Fe2+ + 2e -0,41 Rb → Rb+ + e …

Solubility of inorganic compounds

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Stem correction for mercury thermometers

In general, a mercury thermometer is not completely in the room whose temperature is to be measured. This allows faults to creep in the temperature measurement, but you can correct (especially if one is interested in an accurate temperature measurement). The correction formula is as follows: K t = n (tt ‘) f g TK Correction to the Kelvin temperature …

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