Sodium hydrocarbonate

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  Sodium hydrocarbonate   
Names: sodium hydrocarbonate
sodium bicarbonate
bicarbonate of soda
baking soda
bread soda
cooking soda

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
7.4750 Å
0.7475 nm
, b=9.686 Å
9.6860 Å
0.9686 nm
, c=3.481 Å
3.4810 Å
0.3481 nm
α=90°
90°  
, β=93.38°
93°22′48.0″  
, γ=90°
90°  

Forms:
https://media.crystalls.info/w/uploads/media/Needle.json


https://media.crystalls.info/w/uploads/media/Spherolit.json


Color: white

colorless

Decomposition point: 60°C
333.15 K
140 °F
599.67 °R

Refractive index: 1.377 (α direction)
1.501 (β direction)
1.583 (γ direction)
Electrical properties: dielectric
Magnetic properties: diamagnetic
Hardness: very fragile
Toxicity: non-toxic

Description

Inorganic compound, acidic salt of alkaline metal sodium and inorganic carbonic acid. Doesn`t form water hydrates

Minerals

Occurs in nature as nahcolite mineral.

Where to buy

In grocery store (as "baking soda").

Synthesis

Reaction between sodium carbonate or hydroxide and excess of carbon dioxide

Chemical equation:

Na2CO3 + CO2 + H2O = 2NaHCO3
NaOH + CO2 = NaHCO3

For preparation 100g of sodium hydrocarbonate a 63.08g of carbonate or 47.61g of sodium hydroxide and minimum 104.78g of carbon dioxide is required.

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.

However, the cost of reagents is much higher than the market price of the resulting material, so its production is not economically feasible.

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.

Notes

Almost doesn`t grow as single crystals.

Solubility

Temperatureg/100g of waterg/100g of ethanol 40%g/100g of methanolg/100g of acetoneg/100g of glycerol
0°C
273.15 K
32 °F
491.67 °R
6.9
6.9 g/100g
6.455 %
10°C
283.15 K
50 °F
509.67 °R
8.2
8.2 g/100g
7.579 %
15°C
288.15 K
59 °F
518.67 °R
~8.90
8.9 g/100g
8.173 %
20°C
293.15 K
68 °F
527.67 °R
9.6
9.6 g/100g
8.759 %
1.2
1.2 g/100g
1.186 %
~2.17
2.17 g/100g
2.124 %
0.02
0.02 g/100g
0.02 %
7.86
7.86 g/100g
7.287 %
25°C
298.15 K
77 °F
536.67 °R
~10.4
10.4 g/100g
9.42 %
30°C
303.15 K
86 °F
545.67 °R
11.1
11.1 g/100g
9.991 %
40°C
313.15 K
104 °F
563.67 °R
12.7
12.7 g/100g
11.269 %
50°C
323.15 K
122 °F
581.67 °R
14.5
14.5 g/100g
12.664 %
60°C
333.15 K
140 °F
599.67 °R
16.5
16.5 g/100g
14.163 %
Insoluble in ethyl acetate and methyl acetate.

Gallery

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