Baking soda is alkaline and lemon is acidic. Both acid and alkali can do some harm to teeth. It is recommended that you do not use it for a long time. If you want to whiten your teeth, you can consider doing cold light whitening.

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Lemonade, generally referring to water with lemon juice or lemon slices, is a common drink. Lemonade is rich in vitamins, has a beauty effect, can prevent and eliminate skin pigmentation, and has a whitening effect. Lemonade can also alleviate the role of calcium ions in promoting blood coagulation, and can prevent and assist in the treatment of hypertension and myocardial infarction. Because the pH value of lemon is as low as 2.5, people with hyperacidity and gastric ulcer should not drink lemonade.

Sodium bicarbonate, chemical formula NaHCO? Commonly known as baking soda. White fine crystal, more insoluble in water than sodium carbonate. It is also an industrial chemical. Solids above 50℃ begin to decompose gradually to produce sodium carbonate, carbon dioxide and water, and completely decompose at 270℃.

Sodium bicarbonate is an acid salt formed by neutralization of strong alkali and weak acid, which is weakly alkaline when dissolved in water. This characteristic can make it a leavening agent in food production. Sodium carbonate will remain after the action of sodium bicarbonate, and excessive use will make the finished product have an alkaline taste.

References:

Baidu encyclopedia-lemonade

References:

Baidu encyclopedia-baking soda