Baking
soda 小苏打 xiǎo sū dǎ is a common food ingredient 食材 shí
cái. The chemical composition of baking soda 小苏打 xiǎo sū
dǎ is sodium bicarbonate NaHCO3 碳酸氢钠 tàn suān qīng nà.
Baking soda 小苏打 xiǎo sū dǎ is often used to cause cakes
and bread to rise during the baking process. During the
heating (baking) process, a chemical change 化 学变化 huà
xué biàn huà / chemical reaction
happens. The baking soda 小苏打 xiǎo sū dǎ or sodium
bicarbonate NaHCO3 碳酸氢钠 tàn suān qīng nà releases carbon dioxide CO2 二氧化碳 èr yǎng huà tàn which
is then trapped in the cake / bread.
The heat 热能 rè néng from the
cooking also causes the trapped carbon dioxide CO2 二氧化碳
èr yǎng huà tàn to expand, thus raising the cake / bread.
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