(Ping Xie) Pale Clouds, Gentle Rain

The author knows that copper cannot react with dilute sulfuric acid, but concentrated sulfuric acid reacts with copper. ?

Wow, this article is great, so gentle and detailed, it makes my heart beat.

That's it. It's a bit short. I haven't read enough yet. It's very well written.

The author is suspected of puppy love (⊙o⊙)!

Ping Xie fandom is really sweet... Thank you, dear Zhuangzai, I am Da Ping Xie, I love you so much~ I won't say anymore, I have to work hard...