does baking soda get rid of kidney stones?

[Foreigner]

No they're not.
Pharmacological doses of potassium citrate and potassium bicarbonate are used to alkalize the blood and alkalize the urine specifically to dissolve kidney stones.

Dissolution of radiolucent renal stones by oral alkalinization with potassium citrate/potassium bicarbonate - PubMed

Urinary alkalization with potassium citrate/bicarbonate is a well tolerated and highly effective treatment, resulting in dissolution of nonobstructing uric acid stones.

pubmed.ncbi.nlm.nih.gov

Those are uric acid stones, in that study. Uric acid stones are due to kidney acidosis, which is related to gout, a very specific condition that is not simply confined to kidney stones. In that case, kidney stones are one of the sequelae of a primary condition: the body's inability to properly process uric acid. Uric acid forms its own crystals that are not salts, which is why they can interact with bicarbonate through acid/base chemistry.

The majority of kidney stones are calcium oxalate and can't be dissolved by that method because they are essentially salts that can't be cleaved by weak acids like citrate. As I said already. Please read this primer on kidney stones for more information on how kidney stones are typically treated. You'll note that potassium citrate and bicarbonate are not included.

Secondly, "alkalize the blood" is inaccurate. The blood doesn't get alkalized in any significant way except in alkalosis, which is a pathology. If it could fluctuate that much on a regular basis, life would not be possible. Just because alkali makes it to urine does not mean the blood was alkalized en route. The blood doesn't get alkalized by ingesting something and then re-neutralized in response. The blood is already a buffer solution that prevents big fluctuations in either pH direction to begin with. Please see blood as a buffer for more information.

Now, unless there's ultimately some kind of point you're trying to make to benefit the OP, I ask you to cease this tedious arguing. Thanks.