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John Burgess, New Zealand
Sodium bicarbonate, bicarb., Baking Soda, Washing Soda, Soda Ash

Soda ASH - anhydrous (without water) technical grade (~98% pure) sodium carbonate - NaCO3 - is known as "soda ash".

WASHING soda ("soda") is hydrated (combined with water) sodium carbonate - NaCO3.10 H2O.

BAKING soda is sodium bicarbonate - NaHCO3 - and can be converted to the carbonate (decomposed) by heating at 50-100 degrees Celsius (120-212 oF).

Baking POWDER is sodium bicarbonate plus a mild acid such as citric or tartaric acid, plus some starch.

You can use WASHING SODA in a hot water solution and place in it a piece of household aluminium foil together with tarnished jewellery to remove the tarnish.

Cheers for now,

John Burgess
Mapua, Nelson NZ

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