Is using Baking Soda (Sodium Bicarbonate) good for cleaning marble countertops? Well, many DIY websites advocate using Baking Soda, as an inexpensive way to clean and polish marble countertops. Since baking soda is often used in the kitchen, one would think, that this is a valid option.
But let’s look deeper into the chemistry of Sodium Bicarbonate. When dry, it is mildly alkaline at pH 8.4. In water, sodium bicarbonate dissociates into sodium and bicarbonate ions. If the pH is decreased then carbonic acid (H2CO3 or CO2) can be formed. If the concentration of CO2 in water is above the water solubility limit, the CO2 will distribute to the atmosphere. An addition of bicarbonate to water will alter the pH towards a value of 8.3.
All of this is to say that carbonic acid may damage sensitive marble surfaces.
Kathryn, recently wrote me:
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Torin Dixon is a Stone Care expert, and has been a marble mason, fabricator, stone importer, and distributor of Professional Grade products to Clean, Maintain, and Protect all Natural Stone surfaces. Find quality Stone Care products from HMK StoneCare at http://klou.tt/12m6kvxrrboqz