Sodium hydrocarbonate
From Crystal growing
<amp/>
Sodium hydrocarbonate | |
---|---|
Names: | sodium hydrocarbonate sodium bicarbonate bicarbonate of soda baking soda bread soda cooking soda Е500 food additive
|
Formula: | NaHCO3 |
SMILES: | C(=O)(O)[O-].[Na+] |
Molar mass: | 84.006 g/mol |
Density: | 2.159 g/cm3 |
Crystal system: | monoclinic a=7.475 Å, b=9.686 Å, c=3.481 Åα=90°, β=93.38°, γ=90° |
Shapes: |
|
Color: | white colorless |
Decomposition point: | 60 °C333.15 K <br />140 °F <br />599.67 °R <br /> |
Refractive index: | 1.377 (α direction) 1.501 (β direction) 1.583 (γ direction) |
Magnetic properties: | diamagnetic |
Hardness: | very fragile |
Toxicity: | non-toxic LD50=4220mg/kg |
Description
Minerals
Occurs in nature as nahcolite mineral.Where to buy
In grocery store (as "baking soda").Precursors
Reaction between sodium carbonate or hydroxide and excess of carbon dioxide
Chemical equation:
For preparation of
Place to the flask with carbonate or hydroxide sodium solution an end of connecting tube and pass small portions carbon dioxide through it. After reaction will stop, filter the solution and use it for crystal growing.100.00
g of sodium hydrocarbonate а 63.08
g of carbonate or 47.61
g of sodium hydroxide and 26.19
g of carbon dioxide is required.However, the cost of reagents is much higher than the market price of the resulting material, so its production is not economically feasible..
Notes
Almost doesn`t grow as single crystals.Storage conditions
Store in its original form or under several layers of varnish at average humidity and room temperature. Do not store in matchboxes or cotton wool and do not heat.Solubility
Temperature | гр/100,00 гр water | гр/100,00 гр ethanol 40% | гр/100,00 гр methanol | гр/100,00 гр acetone | гр/100,00 гр glycerol |
---|---|---|---|---|---|
0°C273.15 K <br />32 °F <br />491.67 °R <br /> | 6.9 | ||||
10°C283.15 K <br />50 °F <br />509.67 °R <br /> | 8.2 | ||||
15°C288.15 K <br />59 °F <br />518.67 °R <br /> | ~8.90 | ||||
20°C293.15 K <br />68 °F <br />527.67 °R <br /> | 9.6 | 1.2 | ~2.17 | 0.02 | 7.86 |
25°C298.15 K <br />77 °F <br />536.67 °R <br /> | ~10.4 | ||||
30°C303.15 K <br />86 °F <br />545.67 °R <br /> | 11.1 | ||||
40°C313.15 K <br />104 °F <br />563.67 °R <br /> | 12.7 | ||||
50°C323.15 K <br />122 °F <br />581.67 °R <br /> | 14.5 | ||||
60°C333.15 K <br />140 °F <br />599.67 °R <br /> | 16.5 |
Gallery
Video
Sources
Carbonates | |
---|---|
Salts |
Calcium carbonate (CaCO3) • Magnesium hydrocarbonate (Mg(HCO3)2) • Sodium carbonate (Na2CO3) • Sodium hydrocarbonate (NaHCO3) |
Complexes |
Sodium dicarbonatocuprate(II) (Na2[Cu(CO3)2]) |