If it is over 400 degrees Fahrenheit, then it would be a steam geyser, more like old faithful, not even water at all. And acidic just means a pH lower than 7, not necessarily flesh stripping sulphuric acid. That would require a pH somewhere around 2.0 or lower and rarely occurs in nature.
The NEWS was not entirely correct, "The temp of 459F was at 1,000 feet down at the surface "
There are very few thermal features at Norris under the boiling point (199°F at this elevation)."
"Norris Geyser Basin comprises of three main areas: Porcelain Basin, Black Basin, and One Hundred Springs Plain. It is one of the most dynamic places in Yellowstone National Park because some of the pools here are some of the oldest, hottest and most acidic around. This thermoacidophilic niche is typically located in aquatic environments with high moisture content, including various geothermal hot springs and volcanic mud pools.
The niche is adapted to highly acidic environments, generally with a pH of less than 4. Due to active volcanic activities in the area, the springs and pools in which the acidophilic niche is found are typically of fairly high temperature, usually ranging from 65 to 90 degrees Celsius. The niche is typically immersed in pools with high sulfur contents, either as hydrogen sulfide (H2S(g)) emitted as a volcanic gas, or as elemental sulfur crystals. Some niches are also found in pools rich with other metals, typically iron (1)."
Hope that is acidic enough for you.
So as we can apparently not link direct to things perhaps take a tour of the
Norris Basin at Yellowstone
The guy is dead and dissolved.
Be comfortable sitting at home safe behind your computer screen and ridicule others less fortunate. What a crowd.

Pretty sad.