Q: Thank you so much for your article on rust and oxalic acid ("Rust isn't her best color," Jan. 7). We have had this problem for years! And it is frustrating. We even have our water treated through ...

Oxalic acid, or oxalate, is a naturally occurring organic compound in plant foods like vegetables, fruits, grains, and nuts. Your body also produces small amounts of oxalate. Oxalic acid is sometimes ...

Q: My concrete sidewalk and driveway have large brown rust stains that I haven’t been able to remove. I tried bleach and a chemical remover to no avail. Can you help? A: Rust stains on concrete seem ...

Do you remember asking the classic question in high school chemistry class, “When will I ever use this?” I admit that I was one who posed this question loud enough that I was rewarded with an ...

Oxalic acid, the toxic substance that police investigators blame for the deaths of those killed in the recent milk tea poisoning in Manila, appears harmless enough in its crystalline form as it looks ...

Q: I've heard that spinach and some other vegetables contain significant amounts of oxalic acid, which can interfere with absorption of some minerals. What do you think about the oxalic acid issue? A: ...

Removing carbon dioxide from power plant emissions is a good idea to start with -- and it may have an extra economic benefit. Engineers are presenting results on turning carbon dioxide into oxalic ...